Robert F. Kennedy Jr., secretary of the Department of Health and Human Services (HHS), said the measles outbreak in west Texas is a “call to action” as he encouraged parents to consider whether to get their children vaccinated.

U.S. Health and Human Services Secretary Robert F. Kennedy Jr. said he’s spoken directly with Gov. Greg Abbott about the measles outbreak in Texas, but neither are telling Texas families to get the vaccine that can stop the spread of the highly contagious respiratory illness.

Health Secretary Robert F. Kennedy Jr. publicly backed the measles vaccine Sunday amid an outbreak of the disease in Texas that has already killed one child.