The measles-mumps-rubella vaccine is free for people aged one to 52.

She highlighted how the measles-mumps-rubella vaccine was safe and effective protection against measles.

The disease has mostly affected children who have not received the measles-mumps-rubella vaccine, which confers immunity to the disease.

The majority of U.S. measles cases this year have occurred in children who had not received the measles-mumps-rubella vaccine, which confers immunity to the disease.

Health experts say the virus has spread among school-age children whose parents declined to give them the measles-mumps-rubella vaccine, which confers immunity to the disease.