MM or variants may refer to:
A controversy surrounding the combined measles, mumps, and rubella (MMR) vaccine started with the 1998 publication of a fraudulent research paper in The Lancet linking the vaccine to colitis and autism spectrum disorders.
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.
"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).
"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.
72 kDa type IV collagenase also known as matrix metalloproteinase-2 (MMP-2) and gelatinase A is an enzyme that in humans is encoded by the MMP2 gene.
MMX is a single instruction, multiple data (SIMD) instruction set designed by Intel, introduced in 1997 with its P5-based Pentium line of microprocessors, designated as "Pentium with MMX Technology".