03/22/2025
People born before 1958 considered immune from having had Measles. After that, we vaccinated. The original vaccine was inactivated & less effective. Around 1968 they started using the live-attenuated vaccine. This was about 90 % effective. Then in late 1980's a second or booster dose was recommended which made it 97-98% effective. One of our most effective vaccines. If you don't know, just get a dose of the vaccine & boost your immunity.