This summer's Rio de Janeiro Olympics should be moved or postponed because of the ongoing Zika virus outbreak, according to more than 150 global health experts.
In an an open letter to the World Health Organisation (WHO) and the International Olympic Committee (IOC), the experts - including a former White House adviser - called into question the two organisations' close relationship.
And they asked for the Games to be moved to another location or postponed "in the name of public health".
The letter cites the Zika virus has more serious medical consequences than previously known and that the emergency contains "many uncertainties".
One co-author told the Press Association that if this year's Games went ahead they risk becoming "the Olympics of brain damage".
WHO declared the Zika epidemic to be a global emergency in February and in its latest assessment this week, it said it "does not see an overall decline in the outbreak".