"Roman Bystrianyk" wrote in message
ps.com...


What you're referring to is variolation, which is infecting someone
with a weakened smallpox. Vaccination (from the Latin) for cow is
inoculating with cowpox to prevent smallpox.


3/4 of vaccination in 1890 was in fact arm to arm vaccination, UK

still can't see the difference between that and variolation