Why the MMR vaccine is given as one shot, and what separating it could mean
Summary
President Donald Trump signed an order to separate the combined measles, mumps, and rubella (MMR) vaccine into three individual shots. Medical experts say the combined MMR vaccine, used since 1971, is safe and effective, and splitting it could cause more missed vaccinations during a serious measles outbreak.Key Facts
- The MMR vaccine combines protection against measles, mumps, and rubella in a single shot and has been used since 1971.
- President Trump’s executive order suggests giving the three vaccines separately in different doctor visits.
- Doctors and public health experts say no evidence shows the separated shots are safer than the combined one.
- Splitting the vaccine into three shots would increase the number of injections and doctor visits needed.
- More visits and shots could lead to children missing vaccinations, especially during the worst measles outbreak in over 30 years.
- The combined MMR vaccine triggers the same immune response as the three separate vaccines.
- The vaccine’s combination overcomes challenges of mixing different virus strains safely in one shot.
- Health groups have long recommended two doses of the MMR vaccine to ensure full protection in children.
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