PHILADELPHIA (AP) — City health officials say the first case of Zika virus has been identified in a Philadelphia resident.

The department said Monday that the infection occurred in a woman over the age of 60 who had recently returned from travel to the Caribbean. Officials said she was not hospitalized for the infection and is now recovering without complications.The Zika virus is most commonly transmitted from the bite of a mosquito, and many people infected do not get sick. Medical authorities say most people recover in about a week from symptoms such as fever, rash and joint pain.But health officials are investigating whether there is a link between Zika infections in pregnant women and a rare birth defect called microcephaly, in which babies are born with abnormally small heads