https://en.wikipedia.org/wiki/Zika_fever
As of November 2015, reports from the Brazilian Health Ministry alerted people to a previously unknown connection between the zika virus and cases of newborn microcephaly in Northeastern Brazil.[16][17][18] The Ministry later confirmed [19][20] the previously suspected connection between zika infection of pregnant women and newborn microcephaly, with at least 2,400 reported cases of microcephaly in the country this year as of 12 December 2015, and 29 fatalities.[10][21] According to a CNN report, Brazilian health officials were also recommending that parents consider putting off pregnancy due to the sharp increase in cases of microcephaly.[22]