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.


Vaccine Components

Aluminum Adjuvants in Vaccines

Some vaccines contain chemicals called adjuvants to help stimulate the production of immunity against the vaccine ingredients, making the vaccine more effective. In the United States, aluminum salts have frequently been incorporated as adjuvants in vaccines.