the.com/vaccination

Teaching your immune system to fight a war by reading the enemy's diary.

means The act of giving someone a vaccine — a preparation that trains the immune system to recognize and resist a specific disease without causing the full illness.

from From Latin vacca, 'cow' — a genuinely bovine origin. In the late 18th century, the physician Edward Jenner noticed that milkmaids who caught the mild cowpox seemed spared from deadly smallpox, and he used material from cowpox sores to inoculate against it. The cow-derived procedure was dubbed 'vaccination,' from variolae vaccinae, 'cowpox.' Later the word was generalized to cover all such immunizations, so even your flu shot still carries a faint echo of a dairy barn.

word origin
From vacca, Latin for cow, via cowpox
first jab
Edward Jenner infected a boy with cowpox in 1796
smallpox kill count
Eradicated a disease that killed 300 million in 1900s
variolation
China was snorting dried smallpox scabs centuries earlier
herd effect
Vaccinating you also protects those who can't be
for instance

mrna covid-19 vaccines — pfizer-biontech and moderna vaccines deployed globally starting december 2020

smallpox vaccination — edward jenner's 1796 experiment; disease declared eradicated in 1980

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