The MMR vaccine includes protection against measles, mumps and rubella, so the MMR vaccine can be used instead of the mumps vaccine. Mumps is a respiratory infection caused by the mumps virus, which is mainly spread by droplets and occurs mainly in children and adolescents. It can occur throughout the year, mainly in winter and spring, with a high incidence from February to May each year, and mainly in crowded areas such as military barracks, classrooms and kindergartens. The main symptom of mumps is swelling of the parotid gland, which is non-suppurative, often swollen on one side and later spreading to the other side, centered on the earlobe, developing forward, backward, and downward, or accompanied by generalized fever and complications such as encephalitis, pancreatitis, orchitis, etc.