Luana Vieira, 4 months old, who was born with microcephaly, is carried by her mother Rosana Vieira Alves,...
Luana Vieira, 4 months, who was born with microcephaly, is carried by her mother Rosana Vieira Alves, as Rosana walks with her other daughters to school, in Olinda, Brazil, February 4, 2016. Brazil is investigating more than 4,000 suspected cases of microcephaly, a condition in which infants are born with abnormally small heads and can suffer developmental problems, that may be linked to the Zika outbreak. REUTERS/Ueslei Marcelino