The U.S. now has three newborns with Zika-related birth defects, according to the Centers for Disease Control and Prevention.
Puerto Rico now has 1,700 confirmed cases of Zika, almost 200 of which are in pregnant women. The warm-weather U.S. territory is in the midst of an epidemic of the mosquito-borne illness. The numbers don’t take into account that 80 per cent of infections are without symptoms, a fact that suggests that the actual number of cases is at least five times higher. Evaluations of blood banks in the island has found that more than one per cent of all units donated carry evidence of the Zika virus.