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Heck I thought it pretty much was a given.... In the 1940s
when I start school the local gov’t sent nurses to schools
to vaccinate all of us. Freebies, get in line for yours.
Measles vaccine was licensed in 1963.
When I was seven (1957) there was measles in my classroom. My Dad was a doctor, and he had a public health nurse come to the house and give me a shot of gamma globulin (which contained antibodies to measles, back then) and so I didn't get sick. I also didn't become immune.
When I was 28, I caught measles from a patient. I developed measles hepatitis, measles myocarditis and was out of work for three months. My EKG still has the same abnormality that developed back in 1978.
The big question about the vaccine is, does it confer lifelong immunity as natural infection does. It certainly seems like it does, I can't imagine measles outbreaks in nursing homes beginning in a few years, as childhood vaccination which became universal in the 1970s wears off.
Dpt and smallpox were the only ones at that time.