• A municipal health worker sprays insecticide in an open area of a sports facility, to combat the Aedes aegypti mosquito that transmits the Zika virus, in Recife, Pernambuco state, Brazil, Thursday, Feb. 4, 2016. With no hope for a vaccine to prevent Zika in the near future, authorities are focusing on the most effective way to combat the virus: killing the mosquito that carries it. (AP Photo/Felipe Dana)

    Brazil health official confirm Zika spread via transfusion

    RIO DE JANEIRO (AP) — Two people in southeastern Brazil contracted the Zika virus through blood transfusions, a municipal health official said Thursday, presenting a fresh challenge to efforts to contain the virus on top of the disclosure of a case of sexual transmission in the United States.