Can a baby who has received the MMR vaccine still contract mumps?

Even infants who have received the MMR (measles-mumps-rubella) vaccine can still contract mumps. However, after vaccination, mumps infection is typically milder and of shorter duration. Since mumps is generally caused by a viral infection and is highly contagious, strict isolation measures should be implemented if an infected source is present—avoiding close contact with others. When necessary, antiviral medications such as ribavirin granules may be administered under a physician’s guidance.