Catalan Vaccinia Cited by user Mcapdevila on 29 May 2022 L'oportunitat de provar si el «cowpox» era capaç de protegir contra la verola humana, se li va presentar el 1796, quan una lletera del comtat de Gloucester (Anglaterra)…
English Vaccinia Cited by user Graham87 on 14 Oct 2016 Smallpox was the first disease to be widely prevented by vaccination due to pioneering work by the English physician and scientist Edward Jenner in the eighteenth…