Epicenter of the Zika Virus: New2016Updates018

Rozilene Ferreira de Mesquita, center, holds her son, Arthur Ferreira da Conceicao as she listens to a doctor during a visit to Hospital das Clinicas da Universidade Federal de Pernambuco for Arthur on Monday March 14, 2016 in Recife, Brazil. Arthur was born with microcephaly, which the Zika virus is being linked to. (Photo by Matt McClain/ The Washington Post)

Rozilene Ferreira de Mesquita, center, holds her son, Arthur Ferreira da Conceicao as she listens to a doctor during a visit to Hospital das Clinicas da Universidade Federal de Pernambuco for Arthur on Monday March 14, 2016 in Recife, Brazil. Arthur was born with microcephaly, which the Zika virus is being linked to. (Photo by Matt McClain/ The Washington Post)