British Olympians have warned against feeding the “fear factor” but admit the rapid spread of the Zika virus is “scary”, “daunting” and “worrying”.
Brazilian authorities say there will be no risk to athletes and spectators, except pregnant women, when the Rio Games take place in August.
Modern pentathlete Samantha Murray, 26, said the virus was a concern.
But she said she had been assured by British officials that “everything is being done to prepare the team”.
Murray won a silver medal at the 2012 Games in London and is hoping to be on the podium again in Rio.
The World Health Organization (WHO) has declared the Zika virus a global public health emergency.
That puts it in the same category of importance as Ebola.
No vaccine or treatment exists for the virus.
The International Olympic Committee has said Rio will be safe and venues will be inspected daily before and during the Games to minimise the impact of the virus.