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Why are two doses of MMR vaccine needed?

doses MMR needed vaccine
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Why are two doses of MMR vaccine needed?

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To give better protection. After the first dose, between 5% and 10% of children are not protected against the diseases. After two doses of MMR, less than 1% are left unprotected. Not all children receive the first dose of MMR. This means that each year the number of children who remain susceptible to measles, mumps and rubella will increase. The second MMR visit is needed to protect those children who did not respond to the first dose, and provides an opportunity to give a first dose to children who didn’t receive the vaccine earlier. Children who did respond to the first dose get a boost to their antibodies with a second dose. For this reason, all countries in the European Union and the US, Canada, Australia and New Zealand recommend two doses of MMR.

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