How Does MMR Work?
MMR is a live attenuated vaccine. This means that it contains the living viruses, which have been altered in such a way as to prevent the vaccine from actually causing any disease. However, the body's immune system still responds to it, providing future protection from the diseases.
In general, live vaccines provide better protection from infections, compared to other types of vaccines. However, in rare cases, they can actually cause the diseases, particularly in people who have weakened immune systems.
Off-Label Uses for MMR
On occasion, your healthcare provider may recommend MMR for something other than the reasons discussed in this article (this would be known as an "off-label
" use). At this time, there are no universally accepted off-label MMR uses.