The National Network for Immunization Information (NNii) provides up-to-date, science-based information to healthcare professionals, the media, and the public: everyone who needs to know the facts about vaccines and immunization.

Vaccine Safety

Should My Child Receive the Measles, Mumps, and Rubella Vaccines Individually Rather Than as a Combination?

Some media reports have said that parents should not use the MMR vaccine but have their children immunized against measles, mumps and rubella one at a time (i.e., on three separate occasions, as long as one year apart). This is a potentially dangerous advice that increases a child's risk of being needlessly harmed by serious diseases that can be effectively and safely prevented.

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For Professionals

This section includes links to general immunization recommendations in the United States and other valuable information for health professionals.

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