January 29, 2016 12:56 PM EST

About nine months after Brazil recorded its first case of Zika, the mosquito-borne virus that medical officials have linked to a severe birth defect in newborns called microcephaly, the country lies at the center of a rapidly growing outbreak that has seen thousands of cases appear throughout the Americas. Some 4,000 cases have been reported in Brazil, many of them in Recife, a state capital in the northeast.

Read next: Why the Zika Outbreak Marks a New Normal for Infectious Disease

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