WHO says Zika virus spreads explosively, four million cases forecast
By Tom Miles and Stephanie Nebehay GENEVA (Reuters) – The Zika virus, linked to severe birth defects in thousands of babies in Brazil, is “spreading explosively” and could infect as many as 4 million people in the Americas, the World Health Organization (WHO) said on Thursday. Director-General Margaret Chan told members of the U.N. health agency's executive board the spread of the mosquito-borne disease had gone from a mild threat to one of alarming proportions. “The level of alarm is extremely high,” Chan told the Geneva gathering.