Olympians bound for Rio this summer have something else to worry about.
With about 180 days to Rio 2016 and Brazil is reeling under the affects of the Zika virus.
"In many ways the Zika outbreak is worse than the Ebola epidemic of 2014-15," said Jeremy Farrar, head of the Wellcome Trust. "Most virus carriers are symptomless. It is a silent infection in a group of highly vulnerable individuals - pregnant women - that is associated with a horrible outcome for their babies."
As a result of the Zika outbreak and the possible connection to microcephaly, several Central and South American countries - including Ecuador, El Salvador, Jamaica and Colombia - have asked women to avoid becoming pregnant for the next two years.