The number of measles cases associated with an outbreak in Texas has increased to 159 -- an increase of 13 cases in the past five days, authorities said on Tuesday.

Summary

Texas’ measles outbreak has reached 159 cases, with 13 new cases in the past five days, mostly among unvaccinated individuals.

Gaines County remains the epicenter, with cases also reported in other Texas counties. The outbreak has led to one death—the first U.S. measles fatality in a decade.

The CDC has deployed a response team, treating patients with steroids, antibiotics, and vitamin A. Vaccine exemptions in Texas have risen significantly, contributing to the outbreak.

Health officials continue to urge vaccinations.