Associate Professor of Demography,
Harvard T.H. Chan School
As of 4th March 2016
– 5900 suspected cases
– 640 confirmed for microcephaly
– Only 80 had zika virus
Note: Zika (or dengue) found in 80 out of 640 (12.5%) cases of confirmed microcephaly. 87.5% of microcephaly cases tested negative for zika (or dengue) virus. Dengue virus may be creating false positives for zika. Zika and dengue are very similar.