MMR

MMR may refer to:

==Science and technology== MMR vaccine, for measles, mumps and rubella DNA mismatch repair, a genetic repair pathway Mass miniature radiography, a tuberculosis screening technique Maternal mortality ratio Maternal mortality rate Mean-motion resonance, between two orbiting bodies Mesozoic Marine Revolution, a burst of evolution Micro modular reactor, a subcategory of Small Modular Reactors,  much smaller in scale than traditional nuclear reactors