Dashed left edge = started before January 1823 ·
Dashed right edge = ongoing beyond January 1823
Events in January 1823 1
1749 – 1823Edward Jenner (1749-1823)Died 26 January 1823, aged 73Edward Jenner was an English physician who pioneered the smallpox vaccine, demonstrating in 1796 that inoculation with cowpox gave protection against smallpox. His work founded the field of immunology and led to one of the most consequential public health interventions in history. He died at his home in Berkeley, Gloucestershire.