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Two Utah County residents have tested positive for measles after traveling to Disneyland for the holidays.

Public health officials believe the Utahns were exposed to the virus while on vacation. The Utah cases are part of a larger outbreak being investigated in California. Health officials there have confirmed seven cases and three suspected cases from Dec. 15 -20.

Utah County Health Department leaders say the patients would have been contagious from Dec. 27 through Jan. 5 and provided a list of several events and locations visited during the infectious period, including a couple of movies, grocery stores and church services.

The two patients — both reportedly under 18 years old — had not been immunized for the disease.

Health officials say the best protection from measles is full vaccination — two doses of the MMR vaccine. Those who haven't had both shots or are unsure of their vaccination status should contact their health provider.

Pregnant women, infants and those with weakened immune systems are most at risk of developing a severe illness.

Symptoms of measles include a fever of 101 degrees Fahrenheit or higher, cough, runny nose and a rash that spreads to cover the body. The rash usually occurs within two weeks of exposure.

Measles is spread from coughing or sneezing, and is so contagious that 90 percent of people in close contact with an infectious person will get the disease if they're not immunized.

Health officials need to know if people exposed to the patients are fully vaccinated so they can implement appropriate measures to contain any outbreak.

Those who are not fully vaccinated will be asked to quarantine themselves in their homes until the infectious period has passed. That means no school, work, church or travel for 21 days from the date of exposure.

Anyone who was present at the locations and times the patients visited is urged to contact the Utah Poison Control Center, which is screening individuals for potential exposure, at 1-800-456-7707, or visit the web site http://www.health.utah.gov/measles. Potential Exposures:

Dec. 26 • Orem Macey's Grocery Store, 5 to 11 p.m.

Dec. 26 • Provo Cinemark Movies 8, 4 to 8 p.m.

Dec. 26 • Provo Carmike Wynnsong, 10 p.m. to closing

Dec. 28 • Orem Geneva Heights LDS Church, 847 W. 800 North, 12:30 p.m. to 7 p.m.

Dec. 29 • Orem Wal-Mart, 9 to 11 p.m.

Jan. 2 • Orem Community Hospital, east entrance lobby, lab or gift shop, 4:30 to 7 p.m.

Jan. 3 • Timpanogos Regional Hospital, ER waiting room and registration desk,12:30 to 3:30 p.m.

Jan. 3 • Timpanogos Regional Hospital, lab waiting room, 1:30 to 3:30 p.m.

Jan. 4 • Timpanogos Regional Hospital, lab waiting room, 1:45 to 3:45 p.m.