Years ago I could find two round  scar-patches on my upper arms.  -  Mother had them too,  told me they were   SmallPox innoculations.   Anyone older than 65 is likely to have them or equivalent,  so in theory,  we're "safe"  from it.
From memory,  Jenner was a Very Naughty Doctor in that he used his son's  Best Friend as his first  'Lab-Rat'....  nothing said about Informed Consent etc.
  Also, recall that Jenners worst enemies were fellow medicos of the day.    Jealous of his Discovery ?  or did they know something  bad  about Eddie ????
Would this article about Mary M  be similar to what you're referring to ?  -  Note the  "gender-ism"  which both preveneted information being widely disseminated,  yet at the same time the repressiveness  increased co-operation among the Women...  Note the dearth of  our  Gold Standard,  the  RCT.   -  They must have used....'Observationals'.  
 An Old Effort To Stop The Smallpox Virus Has Lessons For COVID-19 Today : Shots - Health News : NPR
An Old Effort To Stop The Smallpox Virus Has Lessons For COVID-19 Today : Shots - Health News : NPR
YEs,  once again,  a Quack  steals the glory from it's rightful owner....  Reckon his fellow medical colleagues knew / suspected  Fast Eddy was a crook.
Lady Mary Montagu: unsung pioneer of vaccination | Art UK
And this one to round out the info...  
The medical crank who saved millions - UnHerd    -  The  COMMENTS   section is.... Interesting for today's Plague.
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