Daniele Kelly, 31, who is seven months pregnant, turns on the cooker next to her son Gabriel, 5, inside of their stilt house, a lake dwelling also known as palafitte or 'Palafito', in Recife, Brazil, February 6, 2016. The Zika virus, linked to thousands of birth defects in Brazil, is primarily transmitted through mosquito bites, but word surfaced this week of infections through sex and blood transfusions. REUTERS/Nacho Doce