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1 ene 1928 año - Fredrick Griffins

Descripción:

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 ene 2020
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fecha:

1 ene 1928 año
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~ 97 years ago
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