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.

Health and Human Services Secretary Robert F. Kennedy told people gathered at a funeral for a second child in Texas who died from the disease that a vaccine is the "most effective" way to prevent it.