
Dr Sam Allen, an expert on infectious diseases, has warned all visitors to Rio could be in danger of contracting it.
A string of athletes - including golfer Rory McIlroy and tennis ace Milos Raonic - have pulled out of the Games due to the mosquito-borne virus.
It can cause birth defects in babies, including tots being born with tiny heads.
Dr Allen, 49, said: “The worry is that with the Rio Olympics
less than a month away many athletes and travelling...