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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 1, 2025
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11 abr 1920 ano - William Park, MD

Descrição:

He worked for the New York City Health Department. He helped develop diptheria immunization and was convinced that pfeiffer's bacillus was the cause of 1918's deaths. Vaccines weren't available till october 17th, 1918

Adicionado na linha do tempo:

Data:

11 abr 1920 ano
Agora
~ 105 years ago

Imagens: