1 OldLinkCj: My PSO2 re-patches whenever I try to put the english patch inâ¦ Anyone had/know how to remove this... 2  Ichijin: Just logged in and checked the title counter. 3  Okay so how do these boosts work.
The measles vaccine was first introduced in the United States in 1963. Before 1989, federal guidelines recommended only one dose of the measles vaccine, so people vaccinated before the guidelines changed generally do not have the coverage thatâs now advised.
Vaccination against measles was introduced in 1968. The measles antigen was combined with mumps and rubella with the introduction of the combined MMR vaccine in 1988. Increased incidence of measles in 1994 prompted mass school vaccination with measles and rubella (MR) vaccine for all children aged five to 16 years.A second dose of MMR was introduced for pre-school children in 1996, as a one dose programme would not support eventual measles elimination.ncreased incidence of measles in 1994 prompted mass school vaccination with measles and rubella (MR) vaccine for all children aged five to 16 years. A second dose of MMR was introduced for pre-school children in 1996, as a one dose programme would not support eventual measles elimination.