The Los Angeles County Department of Public Health has announced that a guest who visited the Disneyland theme park Oct. 16 had measles and was infectious.

The person, who was not identified, also went to a Starbucks about 30 miles away earlier that morning, USA Today reported.

People who were at Disneyland or the Starbucks on that day are being told to review their immunization records and make sure they've been vaccinated against measles. If not, then they're being told to see a doctor. The same goes for women who are pregnant, infants, and anyone with a weakened immune system.

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If someone develops a fever or an unexplained rash, they're being told to stay home and call a doctor immediately, the Health Department said in a press release. They could develop the signs of measles infection from seven to 21 days after exposure.

The Health Department will issue a list of additional locations the person visited will be released later, KTLA reported.

Two months ago a teen from New Zealand went to Disneyland while visiting Los Angeles and Orange County, the Los Angeles Times reported. Another outbreak in 2014 was caused by someone who visited the park over the holiday, according to the newspaper.

So far this year there were 19 cases of Los Angeles County residents being diagnosed with measles and another 11 nonresidents having the infection, KTLA reported.