Harvard University

WHO to Rio Olympic visitors: Don't go to poor parts of city

Athletes and visitors heading to the Rio de Janeiro Olympics should avoid poor and overcrowded parts of the city to minimize their chances of catching the Zika virus, The World Health Organization said Thursday.

The U.N. health agency also restated the advice it has been giving for months, warning pregnant women not to travel to Zika-hit areas. It also said that since the mosquito-borne disease can also be spread sexually, pregnant women should abstain from sex or practice safe sex with anyone who has recently returned from areas with outbreaks.

WHO declared the explosive spread of Zika in the Americas to be a global emergency in February and the virus has now been proven to...