Measles, mumps and rubella virus vaccine, made by MERCK, sits on a counter at the Salt Lake County Health Department in 2019.
Mandatory Credit: George Frey/Getty Images via CNN Newsource
Stories this photo appears in:
Mother of Chicago child with measles: It was ‘one of the scarier moments of my life’
When Jessica Coletti’s 3-year-old son Vincent lost his usual pep last month, she worried that something was really wrong.

