New York City's first baby with a Zika-related birth defect was born earlier this month, officials announced Friday. The New York Daily News reports the unidentified baby was born with microcephaly and subsequently tested positive for Zika. Its mother had recently traveled to an area were the virus is being spread by mosquitoes. New York City's deputy mayor of health and human services says the city has been preparing for this eventuality for months due to New York's many immigrants and international travelers. "We are working diligently to help both this mom and this baby," she says. The CDC says a dozen babies with Zika-related birth defects have been born in the US so far, according to NBC New York. (More Zika virus stories.)