1 gen 1928 anni - Fredrick Griffins
Descrizione:
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.Aggiunto al nastro di tempo:
Data:
1 gen 1928 anni
Adesso
~ 96 years ago
