What is the CDC recommended childhood vaccination schedule for the MMR (measles, mumps, rubella) vaccine?

MMR (measles, mumps, rubella) is a combination live attenuated vaccine. CDC recommended schedule: First dose at 12-15 months; Second dose at 4-6 years. Two doses provide approximately 97% effectiveness for measles, 88% for mumps, 97% for rubella. MMRV (also contains varicella) is available as an alternative. The first dose is given after age 12 months because maternal antibodies in the infant blood interfere with vaccine response until then. MMR is contraindicated in: pregnant women (live vaccine, theoretical risk to fetus — though no actual harm documented); severely immunocompromised individuals; anaphylactic reaction to gelatin or neomycin. Common side effects: fever, mild rash, swelling at injection site, joint pain (more common in adults). Serious adverse events are rare. There is NO link between MMR and autism — extensive research has refuted the discredited 1998 Wakefield study; multiple large studies confirm safety. Measles outbreaks have resurged due to vaccine refusal; nurses play key roles in family education about safety and benefits. Adults born after 1957 without evidence of immunity should receive MMR. Healthcare workers need documented immunity to MMR.