As measles cases continue to spread across the United States, experts reveal who may need another vaccine dose and who is protected from the virus.

If you do find yourself with a case, even one case, [it’s] a pretty massive response and takes a lot of staff,” state epidemiologist Zack Moore said.

Adults who were not vaccinated as children should get at least one dose of the measles, mumps and rubella vaccine vaccine. (Eric Risberg/AP file) Editor’s note: We’ve made this story free to all ...