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1 дек 1979 г. - Smallpox declared eradocated

Описание:

humans are the only host (no animal reservoirs and not found in water or dirt) and a single vaccination can protect people for 5+ years. The WHO ceased the intense vaccination programs

Добавлено на ленту времени:

Diseases that challenged the scientific community

ByErica Nguyen
14 дек 2018
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Дата:

1 дек 1979 г.
Сейчас
~ 45 г назад
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