| − | One dose of the MMR (measles, mumps and rubella) vaccine is at least 95-98% effective in creating immunity to measles.<ref>http://www.cochrane.org/CD004407/ARI_using-combined-vaccine-protection-children-against-measles-mumps-and-rubella</ref> Two doses are recommended by the CDC.<ref>https://www.cdc.gov/vaccines/schedules/hcp/imz/child-adolescent.html</ref> This is a live virus vaccine, and may cause some of the symptoms of measles, mumps, or rubella infections.<ref>http://www.who.int/vaccine_safety/initiative/tools/MMR_vaccine_rates_information_sheet.pdf</ref> | + | One dose of the MMR (measles, mumps and rubella) vaccine is at least 95-98% effective in creating immunity to measles.<ref>http://www.cochrane.org/CD004407/ARI_using-combined-vaccine-protection-children-against-measles-mumps-and-rubella</ref> Two doses are recommended by the CDC.<ref>https://www.cdc.gov/vaccines/schedules/hcp/imz/child-adolescent.html</ref> This is a live virus vaccine, and may cause some of the symptoms of measles, mumps, or rubella infections, such as fever, rash, and, in post pubescent females, temporary joint pain. Serious side effects listed by the WHO are as follows(1 in 10 means 1 case of the side effect per 10 doses of vaccine):<ref>http://www.who.int/vaccine_safety/initiative/tools/MMR_vaccine_rates_information_sheet.pdf</ref> |