The beginning of vaccination.
D000486:Allergy and Immunology / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D012899:Smallpox / Q000517:prevention & control*; D014611:Vaccination; D014612:Vaccines; D012901:Variola virus
D014612:Vaccines
BIOGRAPHIES; IMMUNOLOGY/history; SMALLPOX/prevention and control; VACCINES AND VACCINATION