variolation: Quick Facts

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Photos

Wood engraving of a 19th-century hospital ward with rows of beds, patients lying under blankets, and nurses attending to them. Tall windows line both sides of the long room.

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Topics

smallpox immunization vaccine toxoid transfer factor antiserum inoculation

Key People

Ingenhousz, detail of an engraving

Jan Ingenhousz

Dutch-born British physician and scientist