The measles outbreak in western Texas is continuing to grow, with 24 new cases confirmed over the last five days, according to data published Tuesday.

Almost all of the cases are in unvaccinated individuals or in individuals whose vaccination status is unknown, according to the Texas Department of State Health Services (DSHS).

Three of the 505 cases are among residents who have been vaccinated with one dose of the measles, mumps, rubella (MMR) vaccine. Seven cases are among those vaccinated with two doses.

At least 57 measles patients have been hospitalized so far, DSHS said.

Children and teenagers between ages 5 and 17 make up the majority of cases, followed by children ages 4 and under.

Gaines County, which borders New Mexico, remains the epicenter of the outbreak, with 328 cases confirmed so far, DSHS data shows.

This is a developing story. Please check back for updates.