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[Comment] Microcephaly and Zika virus infection

Rarely have scientists engaged with a new research agenda with such a sense of urgency and from such a small knowledge base as in the current epidemic of microcephaly (6000 notified suspected cases in Brazil1 and the first case detected in Colombia in March, 20162) associated with the Zika virus outbreak across the Americas. Indeed, in 2015, in a review of infections that have neurological consequences, Zika virus was not even mentioned.3 In only 5 months since the detection of the first excess cases of microcephaly in Brazil,4 WHO has declared the clusters of microcephaly and other neurological disorders to be a Public Health Emergency of International Concern.