Columbia subject headings:
Smallpox--Early works to 1800.
United States--History--Colonial period, ca. 1600-1775.
Harvard subject headings:
Great Britain--Colonies--America.
Smallpox--Vaccination
United States--History--Colonial period, ca. 1600-1775.
Princeton subject headings:
Smallpox.
United States--History--Colonial period, ca. 1600-1775.