San Antonio officials warn of measles exposure at UTSA and other locations after a visitor tested positive for the virus.

A warning has been issued for three Texas cities after someone with measles visited them while contagious. The Texas Department of State Health Services (DHSH) shared the warning on Monday "so unvaccinated people may monitor themselves for symptoms and seek testing if symptoms occur.

Texas State University shared a map of the locations a measles exposed student reportedly toured the campus on February 14 before visiting Buc-ee's, San Antonio

The university said in an email that a visitor touring the main campus for UTSA Day earlier this month tested positive for the highly infectious disease.