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.
When was the smallpox vaccine invented?   Dr Edward Jenner discovered the vaccine in 1796 and published his findings in 1798. Edward Jenner invented the vaccine for small pox in 1798. He  prepared the vaccine fâ¦rom the cow pox virus.