Mumps is a contagious viral infection caused by the mumps virus. It primarily affects the salivary glands, leading to swelling and pain, especially in the parotid glands located near the jaw. Symptoms may also include fever, headache, and fatigue. Mumps is spread through respiratory droplets or direct contact with an infected person's saliva. Vaccination is the best way to prevent mumps, with the MMR vaccine (measles, mumps, and rubella) being highly effective. While mumps is generally mild, it can lead to complications such as orchitis in males and meningitis. Maintaining good hygiene practices can also help reduce the risk of infection.