U.S. Health and Human Services Secretary Robert F. Kennedy Jr. visited the epicenter of Texas’ still-growing measles outbreak on Sunday, the same day a funeral was held for a second young child who was not vaccinated and died from a measles-related illness.

Sen. Bill Cassidy (R), a medical doctor, called on top health officials to “unequivocally” endorse measles vaccinations before “another child dies.”

Robert F. Kennedy Jr. made a stop in Texas on Sunday to visit the family of a 6-year-old girl who died in February after contracting the measles.