1 янв 1928 г. - Fredrick Griffins
Описание:
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.Добавлено на ленту времени:
Дата:
1 янв 1928 г.
Сейчас
~ 96 г назад
