Of those infected across the U.S., 97% of cases came from those who are unvaccinated or whose vaccination status is unknown.

As more counties are being impacted by the ongoing measles outbreak and added to the growing list of counties across Texas, here's what to know.

Austin-Travis County reports a second measles case involving a vaccinated adult. Officials, including Mayor Watson and Dr. Walkes, will provide updates on the outbreak and responses.