Zika crisis to get 'worse before it gets better:' WHO

The Zika virus, believed to be linked to the serious birth defect microcephaly, presents a "formidable" challenge that will be hard to stamp out, World Health Organization chief Margaret Chan warned Wednesday. Calling mosquito-borne Zika a "bigger menace" than any other recent major health scare in terms of its geographical spread, Chan said tough times lie ahead. The situation "could get worse before it gets better," she said in Rio de Janeiro after a fact-finding mission to Brazil, the epicent