› added 5 years ago

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TIL, the earliest form of smallpox immunization was used in China in the 1500’s. Doctors would take ground up scabs from people with mild cases of the disease, and blow the material into their nostrils. This lead to a mild version of the disease which had a mortality rate of ~2%.(20-30%if untreated)

Read more historyofvaccines.org

via reddit.com

lo0aV TIL about misophonia; a recently proven brain abnormality which means sufferers have a hatred of sounds such as eating, chewing, loud breathing or even repeated pen-clicking (as well as other trigger noises).
d8MVB TIL that the #1 high school in California also has one of the highest suicide rates in the country.
7r09O TIL Humans Can Smell Rain Better Than Sharks Smell Blood
velK TIL: That A Man Renovating His Home In 1963 He Discovered A Tunnel… To A Massive Underground City.
46yJ TIL a milk protein is used in the manufacturing of latex, which means most condoms are unsuitable for use by vegans.