AstraZeneca resumes UK trials of Covid vaccine halted by patient illness

AstraZeneca has resumed British clinical trials of its Covid vaccine, one of the most advanced in development, after getting the green light from safety watchdogs, the company said on Saturday.

The late-stage trials of the experimental vaccine, developed with researchers from the University of Oxford, were suspended this week after an illness in a study subject in Britain, casting doubts on an early rollout.

"On 6 September, the standard review process triggered a voluntary pause to vaccination across all global trials to allow review of safety data by independent committees, and international regulators," AstraZeneca said.

It added that safety reviewers had recommended to Britain's Medicines Health Regulatory Authority (MHRA) that it was safe to resume the British trials.

The patient involved in the study had been reportedly suffering from neurological symptoms associated with a rare spinal inflammatory disorder called transverse myelitis.

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Coronavirus across the globe
BOLOGNA, ITALY - OCTOBER 29: Medical staff work in the Covid-19 intensive care unit at the Maggiore Hospital that was built specifically for the pandemic, on October 29, 2020 in Bologna, Italy. Admissions have increased in recent weeks due to the increase in the number of coronavirus infections. As Covid-19 contagions rise in Italy and the Government impose a new "light" lockdown, the National Health System is concerned about ICUs already collapsing and may not handle so many requests. (Photo by Michele Lapini/Getty Images)
LUGANSK, UKRAINE - OCTOBER 29, 2020: A medical worker wears a protective suit at the Lugansk City Hospital No 1 which treats COVID-19 patients. Alexander Russky/TASS (Photo by Alexander Russky\TASS via Getty Images)
People line up to have their temperatures taken as a preventive measure against the spread of the COVID-19 novel coronavirus at the Ministry of Transport at the border crossing over the second Thai-Myanmar Friendship Bridge in Mae Sot in Tak province on October 29, 2020. (Photo by Lillian SUWANRUMPHA / AFP) (Photo by LILLIAN SUWANRUMPHA/AFP via Getty Images)
Women wearing face masks to protect against the coronavirus disease visit the Central Market in Chisinau on October 29, 2020. (Photo by Sergei GAPON / AFP) (Photo by SERGEI GAPON/AFP via Getty Images)
Medical staff disembark a patient infected with Covid-19 disease arriving by medicalized jet plane from a region where hospitals are overwhelmed, at the Nantes-Atlantique airport in Bouguenais, on October 27, 2020. (Photo by Loic VENANCE / AFP) (Photo by LOIC VENANCE/AFP via Getty Images)
BERLIN, GERMANY - OCTOBER 27: People wear mask as a precaution against coronavirus (Covid-19) pandemic after the government impose wearing masks in crowded streets to contain the pandemic in Berlin, Germany on October, 27, 2020. (Photo by Abdulhamid Hosbas/Anadolu Agency via Getty Images)
Benny Gantz (R), Israel's Alternate Prime Minister and Defence Minister, mask-clad due to the COVID-19 coronavirus pandemic, arrives to attend the "Deadly Arrow" military drill near Kibbutz Ravid in the northern part of Israel on October 27, 2020. - The largest military drill of the year, "Deadly Arrow" is meant to simulate a war against Hezbollah as part of efforts to improve the Israeli military's attack capabilities. (Photo by JALAA MAREY / AFP) (Photo by JALAA MAREY/AFP via Getty Images)
Medics escort a man into a hospital where patients infected with the COVID-19 novel coronavirus are being treated in the settlement of Kommunarka outside Moscow on October 27, 2020. - On Tuesday, authorities reported a record of daily death of 320 people with the disease. Russia has the fourth-highest virus caseload in the world, with a total of 1,547,774 registered infections and 26,589 deaths. (Photo by Alexander NEMENOV / AFP) (Photo by ALEXANDER NEMENOV/AFP via Getty Images)
BERLIN, GERMANY - OCTOBER 27: A man wears a mask as a precaution against coronavirus (Covid-19) pandemic after the government impose wearing masks in crowded streets to contain the pandemic in Berlin, Germany on October, 27, 2020. (Photo by Abdulhamid Hosbas/Anadolu Agency via Getty Images)
NEW YORK, UNITED STATES - 2020/10/25: A woman wearing a face mask walks past a Lincoln Project Billboard that depicts Ivanka trump presenting the number of New Yorkers and americans who have died of Covid-19 and Jared Kushner next to a Vanity Fair quote. (Photo by John Nacion/SOPA Images/LightRocket via Getty Images)
26 October 2020, Mecklenburg-Western Pomerania, Greifswald: A sign with a notice stating that masks must be worn hangs on the building of the University of Greifswald.the corona virus has been detected in several public institutions in the district of Vorpommern-Greifswald.the district asked the population to adhere to rules of hygiene and distance.the public health department and the follow-up team had also worked flat out on contact tracing over the weekend. Photo: Stefan Sauer/dpa-Zentralbild/ZB (Photo by Stefan Sauer/picture alliance via Getty Images)
GAZA CITY, GAZA - OCTOBER 26: Senior high school students, wearing face masks, wait in line before their lessons as they begin face-to-face education after a break as part of the novel coronavirus (COVID-19) pandemic, at the school yard in Gaza City, Gaza on October 26, 2020. (Photo by Ali Jadallah/Anadolu Agency via Getty Images)
Police patrol on horseback along the St Kilda Esplanade in Melbourne on October 26, 2020 as Australian health officials reported no new coronavirus cases or deaths in Victoria state, which has spent months under onerous restrictions after becoming the epicentre of the country's second wave. (Photo by William WEST / AFP) (Photo by WILLIAM WEST/AFP via Getty Images)
25 October 2020, Spain, Teneriffa: A young tourist couple is standing in front of a display board at Tenerife South Airport, which informs about the arrival times of flights from different destinations. German and British tourists arrived back on the Canary Island for the first time this weekend, after the Canary Islands were taken off the risk list again due to falling infection figures. In order to contain the rapidly rising corona infection figures, the government in Spain has again declared a national emergency. The order applies to practically the whole country - with the exception of the Canary Islands. Photo: Andrés Gutiérrez/dpa (Photo by Andrés Gutiérrez/picture alliance via Getty Images)
A man wearing a face mask, walks by a Charlie Chaplin street art, in the Montmartre district of Paris, Sunday Oct.25, 2020. A curfew intended to curb the spiraling spread of the coronavirus, has been imposed in many regions of France including Paris and its suburbs. (AP Photo/Lewis Joly)
25 October 2020, Spain, Teneriffa: A young tourist couple is standing in front of a display board at Tenerife South Airport, which informs about the arrival times of flights from different destinations. German and British tourists arrived back on the Canary Island for the first time this weekend, after the Canary Islands were taken off the risk list again due to falling infection figures. In order to contain the rapidly rising corona infection figures, the government in Spain has again declared a national emergency. The order applies to practically the whole country - with the exception of the Canary Islands. Photo: Andrés Gutiérrez/dpa (Photo by Andrés Gutiérrez/picture alliance via Getty Images)
KAZAN, RUSSIA - OCTOBER 25, 2020: Swimmers in face masks stretch before competing at the 2020 Russian Swimming Championships at the Palace of Water Sports. Yegor Aleyev/TASS (Photo by Yegor Aleyev\TASS via Getty Images)
A Hindu devotee wearing face mask and ornaments visits an almost deserted worship venue of Hindu goddess Durga during Durga Puja, the biggest festival of the region, in Kolkata, India, Sunday, Oct. 25, 2020. The Hindu festival season is traditionally laced with an unmatched fanfare and extravaganza, with socializing being the hallmark of the celebration. But because of the coronavirus pandemic this year's festivities have started on a pale note. (AP Photo/Bikas Das)
A man checks his mobile phone as he sits amid physical distancing markers prior to the start of a movie at CGV Cinemas theater in Jakarta, Indonesia, Friday, Oct. 23, 2020. The cinema reopened this week after months of closure due to coronavirus outbreak. (AP Photo/Tatan Syuflana)
A woman wearing a face mask to protect against the coronavirus rides an amusement park ride at a public park in Beijing, Saturday, Oct. 24, 2020. With the outbreak of COVID-19 largely under control within China's borders, the routines of normal daily life have begun to return for its citizens. (AP Photo/Mark Schiefelbein)
Vatican Swiss Guards, wearing masks to curb the spread of COVID-19, leave the St. Damaso courtyard after Spain's Prime Minister Pedro Sanchez meeting with Pope Francis, at the Vatican, Saturday, Oct. 24, 2020. (AP Photo/Alessandra Tarantino)
Chinese paramilitary policemen wearing face masks to help curb the spread of the coronavirus march down a staircase outside the Great Hall of the People after attending the commemorating conference on the 70th anniversary of China's entry into the 1950-53 Korean War, in Beijing Friday, Oct. 23, 2020. (AP Photo/Andy Wong)
An entertainer plays for people sitting in restaurants in the old part of Bucharest, Romania, Friday, Oct. 23, 2020. In much of Europe, city squares and streets, be they wide, elegant boulevards like in Paris or cobblestoned alleys in Rome, serve as animated evening extensions of drawing rooms and living rooms. As Coronavirus restrictions once again put limitations on how we live and socialize, AP photographers across Europe delivered a snapshot of how Friday evening, the gateway to the weekend, looks and feels. (AP Photo/Andreea Alexandru)
Medical residents, who removed their clothes to protest against working conditions, take part on a protest during a strike in Barcelona, Spain, Tuesday, Oct. 20, 2020. Regional authorities across Spain continue to tighten restrictions against a sharp resurgence of coronavirus infections that is bringing the country’s cumulative caseload close to one million infections, the highest tally in western Europe. (AP Photo/Emilio Morenatti)
Medical residents, who removed their clothes to protest against working conditions, take part on a protest during a strike in Barcelona, Spain, Tuesday, Oct. 20, 2020. Regional authorities across Spain continue to tighten restrictions against a sharp resurgence of coronavirus infections that is bringing the country’s cumulative caseload close to one million infections, the highest tally in western Europe. (AP Photo/Emilio Morenatti)
MOSCOW, RUSSIA - OCTOBER 22, 2020: Moscow Underground employees clean and disinfect a train at Sviblovo depot. Mikhail Japaridze/TASS (Photo by Mikhail Japaridze\TASS via Getty Images)
PRAGUE, CZECH REPUBLIC - OCTOBER 22: A woman stretches after a morning run at the medieval Charles Bridge on October 22, 2020 in Prague, Czech Republic. The Czech Republic is under partial lockdown closing schools, shops, restaurants and limits public activities until November 3. With 1,106 deaths from Covid-19, the Czech Republic has reported almost 15 000 new cases for yesterday. (Photo by Gabriel Kuchta/Getty Images)
A health ministry collects sample for coronavirus testing from a resident at an urban area in Bandar Utama, outskirts of Kuala Lumpur, Malaysia Thursday, Oct. 22, 2020. Malaysia restrict movements in its biggest city Kuala Lumpur, neighboring Selangor state and the administrative capital of Putrajaya from Wednesday in an attempt to curb a sharp rise in coronavirus cases. (AP Photo/Vincent Thian)
A woman wearing a face mask as a preventive measure against the Covid-19 coronavirus looks at her mobile phone as she waits to cross a street during rush hour in Beijing on October 21, 2020. (Photo by NICOLAS ASFOURI / AFP) (Photo by NICOLAS ASFOURI/AFP via Getty Images)
Nepalese devotees wearing protective gear as a precautionary measure against the coronavirus participate on Pachali Bhairav festival in Kathmandu, Nepal, Wednesday, Oct. 21, 2020. The festival which is usually celebrated in the night time during Dashain festival was celebrated during the day because of the pandemic. (AP Photo/Niranjan Shrestha)
Members of the Bavarian state Parliament sit among protections panels as Bavaria's State Premier gives a statement about Covid-19 pandemic, in the Chamber of the Bavarian state Parliament in Munich, southern Germany, on October 21, 2020. (Photo by Peter Kneffel / POOL / AFP) (Photo by PETER KNEFFEL/POOL/AFP via Getty Images)
Pupils of a fifth class at a high school wear face masks as they take part in an electronic learning session in Frankfurt, Germany, Wednesday, Oct. 21, 2020. (AP Photo/Michael Probst)
20 October 2020, North Rhine-Westphalia, Dortmund: Bundeswehr soldiers wait in front of the health department for their deployment. In twelve cities and districts in North Rhine-Westphalia, more than 150 Bundeswehr soldiers are now helping to cope with the Corona crisis. They support the health authorities in tracking down contacts of newly infected persons Photo: Bernd Thissen/dpa (Photo by Bernd Thissen/picture alliance via Getty Images)
MOSCOW, RUSSIA - OCTOBER 20, 2020: A paramedic leaves a temporary medical facility under municipal hospital No 24 for patients with a suspected coronavirus infection, located at the VDNKh Exhibition Centre. Vladimir Gerdo/TASS (Photo by Vladimir Gerdo\TASS via Getty Images)
A picture taken in Milan on October 20, 2020 in one of the lines of the Milan's metro railway shows people wearing protective face masks. - Italy's government has made it mandatory to wear face protection outdoors, in an attempt to counter the spread of the coronavirus Covid-19 pandemic. (Photo by MIGUEL MEDINA / AFP) (Photo by MIGUEL MEDINA/AFP via Getty Images)
NOIDA, INDIA - OCTOBER 19: Students wearing face masks head towards Rajkiya Balika Inter College following a partial reopening since the nationwide lockdown was imposed to curb the spread of coronavirus disease at Sector 51, on October 19, 2020 in Noida, India. (Photo by Sunil Ghosh/Hindustan Times via Getty Images)
20 October 2020, Berlin: Masks in different variations are exhibited in a shop in Berlin-Wilmersdorf in the shop window. Photo: Christoph Soeder/dpa (Photo by Christoph Soeder/picture alliance via Getty Images)
Demonstrators climb a monument as they gather to protest against the COVID-19 restrictive measures at Old Town Square in Prague, Czech Republic, Sunday, Oct. 18, 2020. The Czech Republic has imposed a new series of restrictive measures in response to a record surge in coronavirus infections. Among the measures all sports indoor activities are banned and only up to 20 people are allowed to participate in outdoor sport activities also all bars, restaurants and clubs are closed while drinking of alcohol is banned at public places. (AP Photo/Petr David Josek)
Pedestrians wearing face masks or coverings due to the COVID-19 pandemic, walk past a mural reading "Don't Be Afraid" in Dublin on October 19, 2020, amid reports that further lockdown restrictions could be imposed to help mitigate the spread of the novel coronavirus. - Ireland will crank up coronavirus restrictions, prime minister Micheal Martin said last week, announcing a raft of new curbs along the border with the British province of Northern Ireland. (Photo by Paul Faith / AFP) (Photo by PAUL FAITH/AFP via Getty Images)
Hospitality workers beat their pans to protest in Parliament Square in London, Monday, Oct. 19, 2020. Hospitality workers are demonstrating outside Parliament against tougher coronavirus restrictions and the amount of financial support given by the government to the industry.(AP Photo/Frank Augstein)
A demonstrators is detained during protest against the COVID-19 restrictive measures at Old Town Square in Prague, Czech Republic, Sunday, Oct. 18, 2020. The Czech Republic has imposed a new series of restrictive measures in response to a record surge in coronavirus infections. Among the measures all sports indoor activities are banned and only up to 20 people are allowed to participate in outdoor sport activities also all bars, restaurants and clubs are closed while drinking of alcohol is banned at public places. (AP Photo/Petr David Josek)
KOLKATA, WEST BENGAL, INDIA - 2020/10/18: Children from Sundarban, wearing protective masks, give finishing touches to the artwork and paintings of goddess Durga prior to the Durga puja festival amidst Covid-19 pandemic. (Photo by Jit Chattopadhyay/SOPA Images/LightRocket via Getty Images)
A pedestrian wearing a face mask or covering due to the COVID-19 pandemic, walks past a mural reading "U Are Alive..... so get your head out of your phone" in Dublin on October 19, 2020, amid reports that further lockdown restrictions could be imposed to help mitigate the spread of the novel coronavirus. - Ireland will crank up coronavirus restrictions, prime minister Micheal Martin said last week, announcing a raft of new curbs along the border with the British province of Northern Ireland. (Photo by Paul Faith / AFP) (Photo by PAUL FAITH/AFP via Getty Images)
A woman walks by a graffiti depicting Bolivian ex-president Evo Morales, in La Paz on October 18, 2020 during Bolivia's general election. - Landlocked Bolivia elects a new president on Sunday after a 2019 poll was annulled and follow-up elections postponed twice amid the COVID-19 novel coronavirus pandemic. (Photo by Luis GANDARILLAS / AFP) (Photo by LUIS GANDARILLAS/AFP via Getty Images)
KOLKATA, WEST BENGAL, INDIA - 2020/10/18: Art drawings of Goddess Durga dressed as a doctor and wearing facemask as she spears coronavirus, painted by children of Sundarbans prior to the celebration of Durga Puja festival amidst covid-19 pandemic. (Photo by Jit Chattopadhyay/SOPA Images/LightRocket via Getty Images)
JERUSALEM - OCTOBER 17: People protest against the Israeli Prime Minister Benjamin Netanyahu, demanding his resignation over corruption cases and his failure to combat the new type of coronavirus (Covid-19) pandemic, in front of the House of the Prime Minister (Beit Aghion) in West Jerusalem on October 17, 2020. (Photo by Mostafa Alkharouf/Anadolu Agency via Getty Images)
A protester holds a child (2R) and others react as anti-riot police use a water cannon during a protest of hundreds of football hooligans and far-right voters of Kotleba's LSNS party against the government of Igor Matovic and precautionary measures against the spread of the novel coronavirus (Covid-19) in front of the Government Office in Bratislava on October 17, 2020. - Slovak Prime Minister Igor Matovic said on October 17 the eurozone member will test every resident ages 10 and up for the coronavirus, amid an uptick in infections. Around 500 people gathered outside the government building in downtown Bratislava to protest the latest anti-virus restrictions, despite a ban on gatherings of more than six people. Riot police used a water cannon and tear gas after the crowd started to throw stones and glass bottles. (Photo by VLADIMIR SIMICEK / AFP) (Photo by VLADIMIR SIMICEK/AFP via Getty Images)
GAZA CITY, GAZA - OCTOBER 17: Officials disinfect inside of Al Hassina Mosque within coronavirus (Covid-19) pandemic in Gaza City, Gaza on October 17, 2020. (Photo by Mustafa Hassona/Anadolu Agency via Getty Images)
17 October 2020, Bavaria, Garmisch-Partenkirchen: A waitress holds a tray of beer in an inn. Almost half of the Bavarian districts and independent cities have stricter masks, stricter contact restrictions and closing hours in the gastronomy due to the increasing number of corona. Photo: Angelika Warmuth/dpa (Photo by Angelika Warmuth/picture alliance via Getty Images)
Protest for school closed for the corona virus outside Campania Region in Naples, Italy, on October on 17, 2020. (Photo by Paolo Manzo/NurPhoto via Getty Images)
Protesters of fitness and gym workers against so called second lockdawn in Warsaw, Poland on October 17. (Photo by Maciej Luczniewski/NurPhoto via Getty Images)
ADDIS ABABA, ETHIOPIA - OCTOBER 16: An Ethiopian woman, wearing a face mask as a measure against the novel coronavirus (COVID-19) pandemic, walks past a mural, painted to draw attention to the pandemic in Addis Ababa, Ethiopia on October 16, 2020. (Photo by Minasse Wondimu Hailu/Anadolu Agency via Getty Images)
Demonstrators protest in front of Catalan regional police during a demonstration on October 16, 2020 in Barcelona to protest against the new restrictions imposed by the regional government on bars and restaurants to fight against COVID-19 disease. - Bars and restaurants are to be closed across Spain's northeastern Catalonia region for the next 15 days to slow rising coronavirus infections, the regional government said on October 14, 2020. The move comes as Spain battles one of the highest rates of infection in the European Union, with nearly 900,000 infections and more than 33,000 deaths. (Photo by LLUIS GENE / AFP) (Photo by LLUIS GENE/AFP via Getty Images)
DHAKA, BANGLADESH OCTOBER 16, 2020: Muslims take part in a protest demanding women's safety and justice for rape victims amid the COVID-19 coronavirus outbreak in Dhaka, Bangladesh on October 16, 2020. - PHOTOGRAPH BY Rehman Asad / Barcroft Studios / Future Publishing (Photo credit should read Rehman Asad/Barcroft Media via Getty Images)
MOSCOW, RUSSIA - OCTOBER 16, 2020: Bus passengers wear face masks amid the resurgence of the COVID-19 pandemic. Mikhail Metzel/TASS (Photo by Mikhail Metzel\TASS via Getty Images)
Wearing masks against the spread of the new coronavirus, a newly married couple kiss during a wedding photo session in a classic American car in Havana, Cuba, Thursday, Oct. 15, 2020. (AP Photo/Ramon Espinosa)
Tibby Starks, a worker for the Denver Election Division, wears a face covering with a message to encourage people to vote outside election headquarters during the coronavirus pandemic Thursday, Oct. 15, 2020, in downtown Denver. (AP Photo/David Zalubowski)
BAGHDAD, IRAQ - OCTOBER 15: People watch a film after movie theaters reopened within the easing coronavirus (Covid-19) pandemic restrictions in Baghdad, Iraq on October 15, 2020. (Photo by Murtadha Al-Sudani/Anadolu Agency via Getty Images)
Palestinians wearing a protective masks amid the COVID-19 pandemic attend a rally to protest the reduction of the food basket provided by the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) in Gaza City, on October 14, 2020. (Photo by Mohammed ABED / AFP) (Photo by MOHAMMED ABED/AFP via Getty Images)
MOSCOW, RUSSIA - OCTOBER 14, 2020: A medical staff member in a protective suit works in an intensive care unit for COVID-19 patients at the Clinical Research Center of the Russian Federal Biomedical Agency (FMBA). On October 14, 2020, Russia has reported 13,686 new confirmed cases of the novel coronavirus infection. Mikhail Tereshchenko/TASS (Photo by Mikhail Tereshchenko\TASS via Getty Images)
MOSCOW REGION, RUSSIA - OCTOBER 13, 2020: Medical workers take part in a comprehensive emergency response exercise at Domodedovo International Airport during the COVID-19 pandemic. Sergei Karpukhin/TASS (Photo by Sergei Karpukhin\TASS via Getty Images)
14 October 2020, Brazil, Sao Paulo: At the Vila Formosa cemetery, relatives wearing face masks watch as cemetery workers in protective suits manoeuvre a coffin during a funeral. The Ministry of Health has confirmed 955 377 Covid-19 infected and 46 510 coronavirus deaths. More than a quarter of the newly registered deaths occurred in the state of São Paulo. Photo: Lincon Zarbietti/dpa (Photo by Lincon Zarbietti/picture alliance via Getty Images)
MOSCOW, RUSSIA - OCTOBER 13, 2020: Russian Emergency Situations Ministry employees prepare to carry out disinfection of Kursky Railway Station following a recent surge in COVID-19 cases. Mikhail Metzel/TASS (Photo by Mikhail Metzel\TASS via Getty Images)
People wave Spanish flags during a drive-in protest organised by Spain's far-right Vox party against the Spanish government's handling of the nation's coronavirus outbreak din Madrid, Spain, Monday, Oct. 12, 2020. The protests Monday coincided with 'Dia de la Hispanidad' or Spain's Hispanic Day, the day that commemorates Christopher Columbus' arrival in the New World and also Spain's armed forces day. (AP Photo/Bernat Armangue)
Members of An Garda order counter demonstrators to retreat during an anti-lockdown protest outside Leinster House, Dublin, as Ireland continues to be at a nationwide Level 3 coronavirus lock down. (Photo by Brian Lawless/PA Images via Getty Images)
Actress Nayeli Cortes dressed as the La Llorona character, carries a doll representing her child as she performs in the play La Llorona, performed on top of a chinampa, a small artificial island at Cuemanco pier in Xochimilco, Mexico City, late Friday, Oct. 9, 2020, as the city promotes the upcoming Day of the Dead holiday at the end of the month, amid the COVID-19 pandemic. Legend has it that La Llorona drowned her children and then regretfully looks for them in rivers and towns, scaring locals who can hear her at night. (AP Photo/Marco Ugarte)
YEKATERINBUEG, RUSSIA - OCTOBER 10, 2020: Passengers wear face masks on a bus. According to the Russian government's emergency response center for the prevention of the spread of coronavirus, on October 10, 2020, Russia has reported more than 12,846 new confirmed cases of the novel coronavirus infection, which made the daily maximum since the start of the pandemic. Donat Sorokin/TASS (Photo by Donat Sorokin\TASS via Getty Images)
A woman wears a mask reading in Italian Liberazione (Liberation) as people gather to protest against the government restriction measures to curb the spread of COVID-19, in Rome, Saturday, Oct. 10, 2020. (AP Photo/Andrew Medichini)
A worker in a food shop wears a mask and checks on the food in the shop window in Soho, London, Friday, Oct. 9, 2020. The British economy grew by far less than anticipated during August, raising concerns that the recovery from the coronavirus recession was already stuttering even before the reimposition of an array of lockdown restrictions. (AP Photo/Frank Augstein)
An elderly woman wearing a face shield to curb the spread of the new coronavirus waits her turn in line to be given coupons provided by the municipality of Iztapalapa to buy groceries in Iztapalapa, Mexico City, Thursday, Oct. 8, 2020. The municipal government of Iztapalapa is providing coupons to help poor families cope with the hardship created by the new coronavirus pandemic economic slowdown. (AP Photo/Marco Ugarte)
A keeper checks teeth of a sea lion at closed Zoo in Prague, Czech Republic, Friday, Oct. 9, 2020. The Czech government has responded, to new record high numbers of coronavirus infections, by imposing further restrictive measures to contain the surge, some of them become effective on Friday, others on Monday. Among them, all theaters, cinemas, zoos, museums, art galleries, fitness centers and public swimming pools will be closed for at least two weeks. (AP Photo/Petr David Josek)
PARIS, FRANCE - OCTOBER 09: Sports fan and sports hall owners march towards French Health Ministry building from Raul-Dautry Square to protest government's coronavirus (Covid-19) measures after sports hall are being closed within pandemic measures in Paris, France on October 09, 2020. (Photo by Alaattin Dogru/Anadolu Agency via Getty Images)
A man wearing a mask to protect himself from the coronavirus reads a newspaper in front of a closed shop in Dharmsala, India, Friday, Oct. 9, 2020. India is the world's second most coronavirus affected country after the United States. (AP Photo/Ashwini Bhatia)
South Korean police officers wearing face masks patrol to block protesters' possible rallies against the government in Seoul, South Korea, Friday, Oct. 9, 2020. Seoul city temporarily banned outdoor rallies with 10 or more people over infection risks against the spread of the coronavirus. (AP Photo/Ahn Young-joon)
A medical team member is disinfected before leaving the COVID-19 ward at the Severo Ochoa hospital in Leganes, outskirts of Madrid, Spain, Friday, Oct. 9, 2020. At the peak of the first wave, ICU wards were given over to haste, desperation and even cluelessness about what to do. Now, a well-oiled machinery saves some lives and loses others to coronavirus, but without the doomsday atmosphere of March and April. (AP Photo/Bernat Armangue)
A woman walks past a new artwork by street artist TVBoy depicting US President Donald Trump dressed up in a Superman costume and flying through COVID-19 clouds in Barcelona on October 8, 2020. (Photo by Pau BARRENA / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo by PAU BARRENA/AFP via Getty Images)
MOSCOW, RUSSIA - OCTOBER 8, 2020: Passengers wait outside an EMG express COVID-19 testing lab at Vnukovo International Airport. People arriving from abroad have to submit a coronavirus test result within three days. Sergei Savostyanov/TASS (Photo by Sergei Savostyanov\TASS via Getty Images)
People wearing protective face masks walk in St. Peter's Square at the Vatican on 8 October 2020. - The authorities of the Italian capital Rome have ordered to always wear face protection outdoors, in an attempt to counter the spread of coronavirus disease. (Photo by Tiziana FABI / AFP) (Photo by TIZIANA FABI/AFP via Getty Images)
BRUSSELS, BELGIUM - OCTOBER 08: A view of the empty bars and cafes after The Brussels Capital Region closed all bars and introduced additional precautions on to curb the spread of the coronavirus (COVID 19) in Brussels, Belgium on October 08, 2020. (Photo by Dursun Aydemir/Anadolu Agency via Getty Images)
Performers wearing masks to protect from the coronavirus rehearse for a show at the Badaling Great Wall of China on the outskirts of Beijing on Tuesday, Oct. 6, 2020. Chinese tourists took 425 million domestic trips in the first half of the eight-day National Day holiday, generating $45.9 billion in tourism revenue, according to China's ministry of culture and tourism. The holiday this year, which coincides with the Mid-Autumn Festival, will be a litmus test of whether China's tourism industry can bounce back after being battered by COVID-19.(AP Photo/Ng Han Guan)
Face masks hang on a boat during a nationwide lockdown to curb the spread of the coronavirus, at the port in the mixed Arab Jewish city of Jaffa, near Tel Aviv, Israel, Wednesday, Oct. 7, 2020. (AP Photo/Oded Balilty)
A Kashmiri health worker takes a nasal swab sample of a child to test for COVID-19 in Srinagar, Indian-controlled Kashmir, Tuesday, Oct. 6, 2020. India is the second worst-nation in terms of confirmed coronavirus caseload. (AP Photo/ Dar Yasin)
Madrid Emergency Service (SUMMA) health workers conduct a rapid antigen tests for COVID-19 in the southern neighbourhood of Vallecas in Madrid, Spain, Wednesday, Oct. 7, 2020. About 5.2 million people in Spain, including nearly 4.8 million residents in or around Madrid, are under restrictions on movement due to the second wave of the coronavirus pandemic. (AP Photo/Manu Fernandez)
Wearing protective face masks, pilgrims from the Mouride Brotherhood stand in line to enter the Grand Mosque of Touba during the celebrations of the Grand Magal of Touba, in Senegal, Tuesday, Oct. 6, 2020. Despite the coronavirus pandemic, thousands of people from the Mouride Brotherhood, an order of Sufi Islam, gather for the annual religious pilgrimage to celebrate the life and teachings of Cheikh Amadou Bamba, the founder of the brotherhood. (AP Photo/Leo Correa)
07 October 2020, Schleswig-Holstein, Kiel: Federal police patrol a large compartment of an ICE. In the trains of the Deutsche Bahn the mouth and nose cover is checked. Photo: Axel Heimken/dpa (Photo by Axel Heimken/picture alliance via Getty Images)
GURUGRAM, INDIA - OCTOBER 5, 2020: A silhoutte of construction workers at work seen during sunset, at Dwarka Expressway, near Sector - 94, on October 5, 2020 in Gurugram, India. (Photo by Parveen Kumar/Hindustan Times via Getty Images)
LONDON, UNITED KINGDOM - OCTOBER 06, 2020: British Prime Minister Boris Johnson leaves 10 Downing Street to deliver his leader's speech at a Conservative Party conference, which is held online due to the coronavirus pandemic on 06 October, 2020 in London, England.- PHOTOGRAPH BY Wiktor Szymanowicz / Barcroft Studios / Future Publishing (Photo credit should read Wiktor Szymanowicz/Barcroft Media via Getty Images)
MADRID, SPAIN - OCTOBER 06: A police officer stands to check vehicles at a control point due to the travel restrictions after new restrictions came into effect as the novel coronavirus (COVID-19) cases in the city surge, in Madrid, Spain on October 06, 2020. (Photo by Burak Akbulut/Anadolu Agency via Getty Images)
BRUSSELS, BELGIUM - OCTOBER 06: Representatives of the European travel and tourism companies demonstrate as they say that they have been most affected by COVID-19 pandemic, in Brussels, Belgium on October 06, 2020. (Photo by Dursun Aydemir/Anadolu Agency via Getty Images)
SEOUL, SOUTH KOREA - OCTOBER 06: Disinfection workers wearing personal protective equipment (PPE), disinfect a street to prevent the coronavirus (COVID-19) spread on October 06, 2020 in Seoul, South Korea. South Korea's new coronavirus cases stayed below 100 for the sixth straight day, but the country is bracing for a possible resurgence in new infections after a Chuseok holiday as a slew of clusters was reported. Health authorities had advised people to refrain from visiting their family members and relatives this year over the Korean equivalent of Thanksgiving. They also allowed public transportation to sell only window seats in line with efforts to prevent the spread of the virus over Chuseok holiday, when millions normally travel across the country. The country added 75 more COVID-19 cases, including 66 local infections, raising the total caseload to 24,239, according to the Korea Disease Control and Prevention Agency (KDCA). (Photo by Chung Sung-Jun/Getty Images)
AMAZONAS, BRAZIL - OCTOBER 03: A view of Taruman Park Cemetery used to bury coronavirus (Covid-19) victims is seen as death toll rises due to the pandemic in Manaus, Amazonas, Brazil on October 03, 2020. (Photo by Junio Matos/Anadolu Agency via Getty Images)
GAZA STRIP, GAZA - OCTOBER 03: A woman walks past a mural depicting of a virus to draw attention and raise awareness to the fight against the novel coronavirus (COVID-19) pandemic in Gaza Strip, Gaza on October 03, 2020. (Photo by Mustafa Hassona/Anadolu Agency via Getty Images)
Israeli mounted arrive at the scene of a demonstration against Prime Minister Benjamin Netanyahu and against the second nationwide lockdown imposed by the government in a bid to stem the increase of COVID-19 infection cases, in the coastal city of Tel Aviv, on October 3, 2020. (Photo by JACK GUEZ / AFP) (Photo by JACK GUEZ/AFP via Getty Images)
BETHESDA, MD - OCTOBER 3: Supporters of U.S. President Donald Trump rally outside Walter Reed National Military Medical Center on October 3, 2020 in Bethesda, Maryland. Trump arrived at the hospital yesterday after testing positive for COVID-19. (Photo by Alex Edelman/Getty Images)
IZMIR, TURKEY - OCTOBER 02: In this aerial view from a drone, five luxury cruise ships are seen being broken down for scrap metal at the Aliaga ship recycling port on October 02, 2020 in Izmir, Turkey. With the global coronavirus pandemic pushing the multi-billion dollar cruise industry into crisis, some cruise operators have been forced to cut losses and retire ships earlier than planned. The cruise industry has been one of the hardest hit industries with public confidence in cruise holidays plummeting after a series of outbreaks occurred on cruise liners as the pandemic spread. The crisis however has bolstered the years intake of ships at the Aliaga ship recycling port with business up thirty percent on the previous year. (Photo by Chris McGrath/Getty Images)
The front page of the Evening Standard displays the news of US President Donald Trump after he tested positive to Covid-19, in London, Friday, Oct. 2, 2020.(AP Photo/Alberto Pezzali)
Accountant Abiodun Ayinde watches as the news announces U.S President Donald Trump and First Lady Melania Trump have tested positive for coronavirus, at his office in Lagos Friday, Oct. 2, 2020. Global markets dropped after President Trump said that he and the first lady had tested positive for the coronavirus. (AP Photo/Sunday Alamba)
Pedestrians look an artist from Gurukul art school painting posters carrying messages for U.S. President Donald Trump and first lady Melania in Mumbai, India, Friday, Oct. 2, 2020. President Trump said early Friday that he and first lady Melania have tested positive for the coronavirus, a stunning announcement that plunges the country deeper into uncertainty just a month before the presidential election. (AP Photo/Rajanish Kakade)
Patrons and employees of discotheques hold placards read "We want to work" as they demonstrate in Biarritz, soutwestern France, Friday Oct. 2, 2020. French Health Minister Olivier Veran warned that the government could classify Paris and nearby suburbs as a "maximum alert zone" starting Monday, leading to measures such as shutting bars and banning "family parties" or other big gatherings. (AP Photo/Bob Edme)
A man stands in a NOVID sanitisation booth during a demonstration in Liverpool city centre. (Photo by Danny Lawson/PA Images via Getty Images)
Students wearing face masks to prevent the spread of the coronavirus arrive at a primary school in Peshawar, Pakistan, Wednesday, Sept. 30, 2020. Pakistani students head back to primary schools following their reopening, amid a steady decline in coronavirus deaths and infections. (AP Photo/Muhammad Sajjad)
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AstraZeneca, based in Cambridge, said it could not disclose further medical information.

"The Company will continue to work with health authorities across the world and be guided as to when other clinical trials can resume to provide the vaccine broadly, equitably and at no profit during this pandemic," AstraZeneca said.

It declined to elaborate further on when other global trials were expected to restart, but the Serum Institute of India said it would restart its trials once it had permission from the Drugs Controller General of India.

Governments around the world are desperate for a vaccine to help end the pandemic, which has caused more than 900,000 deaths and global economic turmoil. The World Health Organisation (WHO) had flagged AstraZeneca's as the most promising.

The vaccine is in late-stage clinical trials in the United States, Britain, Brazil and South Africa and additional trials are planned in Japan and Russia.

The pause of the trials came after reports that the United States was aiming for fast-track authorization or approval of a vaccine before November's presidential election.

Leading US and European vaccine developers have pledged to uphold scientific safety and efficacy standards for their experimental vaccines and not bow to political pressures to rush the process.

AstraZeneca has already agreed to supply close to three billion doses to governments across the globe - more than any other vaccine project.

The WHO's chief scientist said the pause in the trial should serve as a "wake-up" call that there would be ups and downs in the development of a vaccine.

"Inevitably with such a large trial there will be times when safety issues arise," said Peter Openshaw, professor of experimental medicine at Imperial College London.

"We must all hope that there are no future events and that the vaccine proves both safe and effective."

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