Page "Vaccination" Paragraph 11

Many times these words are used interchangeably, as if they were synonyms.

In fact, they are different things.

As doctor Byron Plant explains: " Vaccination is the more commonly used term, which actually consists of a " safe " injection of a sample taken from a cow suffering from cowpox ... Inoculation, a practice probably as old as the disease itself, is the injection of the variola virus taken from a pustule or scab of a smallpox sufferer into the superficial layers of the skin, commonly on the upper arm of the subject.

Often inoculation was done " arm to arm " or less effectively " scab to arm "...