MMR vaccine

The MMR vaccine is a vaccine against measles, mumps, and rubella. It contains live attenuated (weakened) measles, mumps and rubella viruses.

Effectiveness
One dose makes 95-98% of children immune to measles, 64-81% immune to mumps, and at least 95% immune to rubella. Two doses make around 88% of children immune to mumps.

Usage
The CDC and NHS recommend that children are given 2 doses of MMR vaccine.

Safety
A 2012 Cochrane review found that safety studies of MMR vaccine have been "largely inadequate", but nonetheless noted this vaccine's "accepted effectiveness".

The following rates of adverse effects have been documented or estimated to occur

Reviews of scientific studies have found no evidence that MMR vaccine causes autism.