Zika, a mosquito-borne virus, has been spreading across Latin America and the Caribbean recently. It prompted U.S. health officials to consider issuing a travel warning. Evidence shows that it may cause microcephaly in newborns, which can result in mental retardation.
Above, Angelica Pereira, left, holds her daughter Luiza as she sits with her husband Dejailson Arruda at their home in Santa Cruz do Capibaribe, Pernambuco state, Brazil, on Dec. 23, 2015. Luiza was born in October with microcephaly.