Thousands of cheerleaders may have been exposed to mumps last month at a national competition in Dallas. Health officials sent a letter to attendees of the National Cheerleaders Association All-Star National Championship informing them that someone with the illness had attended the event.

More than 23,000 athletes and 2,600 coaches participated in the competition from Feb. 23 to 25 at the Kay Bailey Hutchison Convention Center in Dallas. Many traveled from out-of-state, which means that they could potentially infect many more people.

Mumps is known for its symptoms of puffy cheeks and a swollen jaw. It may be accompanied by a fever, headache, loss of appetite, and fatigue.

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