The rare birth defect is associated with the mosquito-borne Zika virus. — -- At the center of the Zika virus crisis is the rise of a dangerous condition called microcephaly. The rare birth defect ...

The condition is called Microcephaly (micro-sef-uh-lee), and according to the Foundation for Children with Microcephaly, it affects up to two and a half percent of the world's population. Microcephaly ...