MM or variants may refer to:
The MMR vaccine is a vaccine against measles, mumps, and rubella (German measles). The first dose is generally given to children around 9 to 15 months of age, with a second dose at 15 months to 6 years of age, with at least 4 weeks between the doses.
Claims of a link between the MMR vaccine and autism have been extensively investigated and found to be false.
"Mmm Mmm Mmm Mmm" is a song by the Canadian folk rock group Crash Test Dummies, It was released on October 1, 1993 as the lead single from their second album, God Shuffled His Feet.
"MMMBop" is a song written and performed by the American pop rock band Hanson. It was released in April 1997 as the lead single from their debut full length studio album, Middle of Nowhere (1997).
МММ was a Russian company that perpetrated one of the world's largest Ponzi schemes of all time, in the 1990s.
Matrilysin also known as matrix metalloproteinase-7 (MMP-7), pump-1 protease (PUMP-1), or uterine metalloproteinase is an enzyme in humans that is encoded by the MMP7 gene.