In this Dec. 16, 2016 photo, Puerto Rico resident Michelle Flandez holds her 2-month-old son Inti Perez, diagnosed with microcephaly linked to the mosquito-borne Zika virus, in Bayamon, Puerto Rico.
In this Dec. 16, 2016 photo, Puerto Rico resident Michelle Flandez holds her 2-month-old son Inti Perez, diagnosed with microcephaly linked to the mosquito-borne Zika virus, in Bayamon, Puerto Rico. CARLOS GIUSTI AP File
In this Dec. 16, 2016 photo, Puerto Rico resident Michelle Flandez holds her 2-month-old son Inti Perez, diagnosed with microcephaly linked to the mosquito-borne Zika virus, in Bayamon, Puerto Rico. CARLOS GIUSTI AP File

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