ALAJUELA, Feb. 18, 2016 -- A woman walks past a banner about the fight against mosquito, carrier of the zika virus, hanging on the building of the Health Ministry in Alajuela, Costa Rica, on Feb. 17, 2016. The World Health Organization on Wednesday launched global response to address the ongoing spread of zika virus infection and the neonatal malformations and neurological conditions associated with it. (Xinhua/Kent Gilbert)