That is what I think my medical records read, and that is what my parents say they witnessed, one of which, my mother, was a nurse at the time.
And about the scar, I doubt I could find it because I have a lot of scars on my upper arms from years of allergy shots and ingrown hairs.
I got my smallpox vaccine in the early sixties. It's a brownish spot on my shoulder about the size of a dime, and has always been visible. This is pretty much universal with smallpox vaccinations, though the location may vary.
I received allergy shots for years,and never got a scar of any kind, let alone one this visible. You might want to double check your medical records. IMHO