The largest measles outbreak in decades has reached San Antonio and San Marcos. Officials say an individual who tested positive for the virus in West Texas traveled to two major universities and one of the nation's busiest tourist attractions — the San Antonio River Walk.

The measles outbreak that began in West Texas has now grown to well over 100 cases, with confirmed cases across Texas and New Mexico and possible exposures as far away as San Antonio and San Marcos. From the ongoing outbreak,

A measles outbreak in Texas has reached San Antonio, with 90 cases reported, mostly in children. Vaccination remains crucial to control the spread.

A growing number of Central Texas health departments are warning residents of possible exposure to measles, the latest sign that the outbreak in West Texas is spreading across the state. Why it matters: Measles is a highly contagious and potentially life-threatening disease that has surged in areas with high vaccination exemption rates.

The Texas measles outbreak is up to 124 cases in 9 counties, according to the latest numbers by the Texas Department of State and Health Services.

The Hays County Health Department has issued an alert of a potential measles exposure in San Marcos. The San Antonio Metropolitan Health District has issued an alert of a potential measles exposure there.

The City of San Antonio is warning residents about a potential exposure to measles at UT San Antonio and the Riverwalk earlier this month.

San Antonio Metropolitan Health confirms there's been no reported cases of measles since the city had an exposure on February 14, when a visitor tested positive

Legacy Traditional School students were exposed to rubella on its Cibolo campus, despite the state reporting no confirmed cases in the region.

Officials at Legacy Traditional School – Cibolo said Thursday they have confirmed a measles case in a first-grade classroom.