For the anatomic term for part of a tooth, see Crown (tooth) and Dental anatomy#Crown and root. 1  A porcelain-fused-to-metal crown for tooth No. 29 on its stone model. It is now ready to be cemented into the patient's mouth. 2  The stone model die for the same PFM crown on tooth No. 29.
A licensed vaccine to prevent measles first became available in 1963, and an improved one in 1968. Vaccines for mumps and rubella became available in 1967 and 1969, respectively. The three vaccines (for mumps, measles, and rubella) were combined in 1971 to become the measles-mumps-rubella (MMR) vaccine. The MMR vaccine is generally administered to children around the age of one year, with a second dose before starting school (i.e. age 4/5).
kgb answers Â» History & Politics Â» History Â» What year did they start vaccinations for the measles? According to the Centers for Disease Control and Prevention, the first live attenuated vaccine was licensed for use in the United States in 1963. Measles can be prevented with the MMR (measles, mumps, and rubella) vaccine. In the United States, widespread use of measles vaccine has led to a greater than 99% reduction in measles cases compared with the pre-vaccine era.