RECIFE, BRAZIL - JANUARY 9: Workers for the Environmental Health Department, go door to door speaking with residents about about how to take care of standing water, which provides perfect breeding ground for the zika-carrying mosquitoes, in Recife, Pernambuco, Brazil, on Saturday, Jan. 9, 2016. There are about 3,530 suspected cases of zika-related microcephaly in Brazil.<br />
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The mosquito-borne Zika virus continues to spread in Brazil, alarming health officials and expecting mothers that their babies will be born with abnormal brain development called microcephaly. While researchers have yet to make a connection, Brazil has the highest number of babies born with mircocephaly - the most cases in Recife, Pernambuco - from mothers who tested positive to the Zika virus. There are about 3,530 suspected cases of zika-related microcephaly in Brazil.