Confirmation that Zika causes microcephaly shifts debate to prevention

By Julie Steenhuysen and Bill Berkrot CHICAGO (Reuters) - After several weeks of study and debate, U.S. health officials concluded that infection with the Zika virus during pregnancy causes the birth defect microcephaly, a finding that experts hope will refocus attention on efforts to stop infections and prompt U.S. lawmakers to fund emergency prevention efforts. "There isn't any doubt that Zika causes microcephaly," Dr. Tom Frieden, director of the U.S. Centres for Disease Control and Preventio