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.
The measles vaccine has been around since 1963 in the United States, but there were still major outbreaks of the disease nationwide in 1976-77 and 1989-91. The 1989-91 outbreak infected more than 55,000 people nationwide, causing 11,000 hospitalizations and about 120 deaths, including about 75 in California.