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In a first, researchers have found evidence of higher susceptibility of some babies to the Zika virus due to a genetic origin, a finding that may help in future vaccine strategy. A Zika virus outbreak in Brazil in 2015 had led to widespread concern after rising incidents of microcephaly were noticed in children born to mothers infected with the virus. The findings, led by researchers from the University of Sao Paulo in Brazil, showed that nearly six to 12 per cent of the babies born from mothers infected with Zika during pregnancy had the congenital Zika syndrome.