(CNN)Here's a look at the Zika virus disease, an illness spread through mosquito bites that can cause birth defects and other neurological defects.
Most people infected with Zika virus won't have symptoms. If there are symptoms, they typically appear a few days to a week after exposure, although the precise incubation period is not known.
Zika is commanding attention because of an alarming connection between the virus and microcephaly, a neurological disorder that results in babies being born with abnormally small heads. Microcephaly can cause severe developmental issues and sometimes death. A Zika infection may cause other birth defects, including eye problems, hearing loss and impaired growth. Miscarriage can also occur.
Cases including confirmed, probable or suspected cases of Zika in US states and territories updated weekly by CDC. It is counting separately the number of pregnant women infected with the virus. In June 2016, CDC began reporting the outcomes of those pregnant women.