A spokesperson for UMC Health System in Lubbock, Texas, said that the child was "receiving treatment for complications of measles while hospitalized" and was not vaccinated.

About 500 Texans, mostly young unvaccinated children, have contracted the disease. The U.S. health secretary is expected to come to Texas.

A second child has died in Texas after contracting measles, The New York Times first reported Sunday—the second confirmed death from the disease in a decade—as more than 600 measles cases have now been confirmed in 20 states,