I was certainly at the tail end of smallpox vaccinations in the US (1972).  Had a big scar on my upper left arm well in to my 30s.  Reading up, they were stopped in 1972 altogether, and from what my mom told me, it was optional at that point, but the doctor she saw was a fairly older and more conservative chap who had a &quot;better safe than sorry&quot; attitude, so vaccinated I became.