The article is full of crap:
"and believe that this action immunizes them against smallpox infection."
"The heads of the various tribes of Baluchistan assured me on the efficacy of this vaccination method. Although the disease is very rare, smallpox sometimes becomes epidemic."
All it takes is assurance and belief and guess what:
Sometimes becomes epidemic.
What else says it works than saying It doesn't.
Bogus information in the book Sherris Medical Microbiology:
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