Athletes and tourists have been told to think carefully before travelling to the 2016 Olympic Games this summer in Rio, where officials are struggling to contain the spread of the Zika virus.
The virus, which is carried by mosquitoes, causes flu-like symptoms in adults but has been linked to birth defects, such as shrunken brains, in the babies of those affected.
The earliest recorded cases of Zika were in Brazil, which now has 1.5million affected and which is set to host the Olympic Games this summer. Athletes and tourists travelling from other parts of the world have been told to think twice before heading to Rio de Janeiro.
The Australian, Russian, American and British teams have all said they are monitoring the situation carefully.