This vaccine is used to help prevent serious, sometimes fatal, infections caused by 3 viruses: measles (also known as rubeola), mumps, and rubella (also known as German measles). These are common childhood infections that may cause severe problems (such as deafness, lung/brain problems... This vaccine contains live viruses that have been weakened. It works by causing the body to produce its own protection (antibodies) against the viruses that cause measles, mumps, and rubella. View More Info

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