The
Zika virus (
ZIKV)
epidemic is spreading 67 countries are now
reporting transmission, and over 2,000 cases of
congenital Zika syndrome (CZS) have been confirmed. The heaviest burden has been borne by those living where
poverty, poor
infrastructure, and lack of
access to health services are common and the penetration of
Aedes aegypti is high. Because most cases are asymptomatic, the most dramatic signs of the
disease appear through the CZS cases. In spite of the need for disaggregated epidemiological data to understand
transmission patterns and evaluate interventions in
vulnerable populations, there is no reliable count of
ZIKV cases by
sex and
ethnicity (1).