Hundreds of visitors to Disneyland may have been exposed to measles.

Los Angeles County health officials say on October 16, between 7:50 a.m. and 10 a.m., a visitor to the California theme-park may have exposed others to the highly contagious disease.

The same person also visited a Starbucks on the West side of Los Angeles.

Health officials warn anyone who may have been at either location at the time may be at risk of developing measles for up to 21 days, and should contact their doctor if they have not been vaccinated.