JIM VARNEY / SCIENCE PHOTO LIBRARY JIM VARNEY / SCIENCE PHOTO LIBRARY
MMR vaccination. Hands preparing to vaccinate a baby with the MMR triple vaccine. This vaccine provides young children with life- long protection from three diseases: measles, mumps and rubella. It consists of weakened samples of the three viruses that cause these diseases. They cause the child's immune system to produce a weakened response, which prepares it for any future infections with the viruses.
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