More than 23,000 cheerleaders may have been exposed to mumps during a national competition last month in Dallas, health officials announced Wednesday.

Officials from the Texas Department of State Health Services posted a letter on Twitter that was sent Friday to parents and participants at the National Cheerleaders Association All-Star National Championship from Feb. 23 to 26, warning them of possible exposure to the contagious viral illness.

“We are sending this letter to make you aware of this exposure and to provide additional information about mumps,” the letter read.

Chris Van Deusen, a spokesman for the agency, told WFAA that someone with mumps from another state attended the competition. Officials have yet to identify anyone in Texas who has since developed the virus in connection to the patient, he said.

Deusen told the Washington Post that the “next few days will probably be telling.”

Mumps, according to state health officials, is typically contracted through saliva and respiratory droplets created when a person with the virus coughs or sneezes. It also can be spread through shared utensils. Symptoms include swollen or tender salivary glands or testicles, low-grade fever, fatigue and muscle aches.

“The time from being infected with the virus to developing symptoms can be as long as 25 days but is typically 14 to 18 days,” the letter continued. “People with mumps are infectious three days before to five days after swollen glands appear. Infected people without symptoms of mumps may still be able to transmit the virus.”

A total of 130 mumps infections were reported in 25 states between Jan. 1 and 27, according to the Centers for Disease Control and Prevention. Since an expanded vaccination program in 1989, reported cases of mumps have ranged from a few hundred to several thousand, but those figures have increased in recent years, from 229 cases in 2012 to more than 6,300 in 2016.

Sheila Noone, a spokeswoman for the National Cheerleaders Association, did not immediately return a message seeking comment. Days after the event ended, the organization boasted on Twitter that 23,655 athletes attended the competition, along with 2,600 coaches from 39 states and nine countries.