The California measles outbreak is officially over, but Surgeon General Vivek Murthy urged Elmo to get vaccinated in a video released by the Obama administration Friday.

"It's my job to make sure everyone stays healthy," Murthy tells Elmo in the video.

"Get all your vaccinations in time" to stay healthy, he continued. "Don't worry, Elmo, it's just a little pinch and it's safe. And tell all your friends on Sesame Street to get vaccinated too."

Officials say the measles outbreak, which started in Disneyland late last year and led to 131 cases, stems from a growing trend among some parents to not have their children vaccinated. There have been 159 measles cases this year in 18 states and the District of Columbia.

Last week the California Department of Public Health said no new cases have been reported for 42 days, which is twice the 21-day incubation period for measles.