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1 jan 1928 ano - Fredrick Griffins

Descrição:

Fredrick Griffins, a British Army medical officer, was trying to find a vaccine for a strain of bacteria that caused pneumonia. He tested 2 strains, a benign and deadly, and found that if heated the benign and deactivated strain became lethal.

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BySophia Mendes
13 jan 2020
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1 jan 1928 ano
Agora
~ 97 years ago
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