The Maine CDC has confirmed that a York High School student, unvaccinated against mumps, contracted the disease while traveling outside the US and subsequently became ill. The person was not isolated during the early stages of the illness and may have exposed others between March 6^th and 8^th, including at a basketball game at Massabesic High School gym on March 7^th.

Mumps is spread through saliva or mucus and objects of surfaces touched by an infected person. The Maine CDC is working to notify close contacts and has provided recommendations for the school. Dr. Siiri Bennett, state epidemiologist, said that mumps can be prevented through vaccination. While the vaccine protection is not perfect, one is nine times less likely to get the disease if vaccinated. Two doses of the vaccine yield the highest protection level.