| − | 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. This is a live virus vaccine, and therefore may cause some of the symptoms of measles, mumps, or rubella infections. | + | 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> |