X-ray of Rosana Vieira Alves's daughter Luana Vieira, who is 4 months old with microcephaly, is pictured at their house in Olinda, Brazil, February 3, 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. Picture taken February 3. REUTERS/Ueslei Marcelino