RT Journal Article SR Electronic T1 Risk estimates for microcephaly related to Zika virus infection - from French Polynesia to Bahia, Brazil JF bioRxiv FD Cold Spring Harbor Laboratory SP 051060 DO 10.1101/051060 A1 Michael A Johansson A1 Luis Mier-y-Teran-Romero A1 Jennita Reefhuis A1 Suzanne M Gilboa A1 Susan L Hills YR 2016 UL http://biorxiv.org/content/early/2016/05/02/051060.abstract AB Zika virus (ZIKV) infection during pregnancy has been linked to birth defects,1 yet the magnitude of risk remains uncertain. A study of the Zika outbreak in French Polynesia estimated that the risk of microcephaly due to ZIKV infection in the first trimester of pregnancy was 0.95% (95% confidence interval: 0.34-1.91%), based on eight microcephaly cases identified retrospectively in a population of approximately 270,000 people with an estimated 66% ZIKV infection rate.2