I was vaccinated in 1969 in order to attend college. My family was vaccinated again in 1979 or 80 in order to go on a cruise somewhere, We had to get it at the hospital emergency room as no local Dr. had it.
You can be vaccinated and not have a scar. Mine took for the first time in 1969 and did not take later. I do have a scar from the one that took. My mother never had a vaccination that took until my little brother rubbed against her with his scab. She has about 10 scars.
Texas! Great memory! yes, the foreign travel was the reason that I qualified for immunization (we were traveling abroard and the doctor was attempting to protect me).