Calf lymph

Calf lymph was the name given to a type of smallpox vaccine used in the 19th century, and which was still manufactured up to the 1970s.

单词	Calf lymph
释义	Calf lymph 英语百科 Calf lymph Calf lymph was the name given to a type of smallpox vaccine used in the 19th century, and which was still manufactured up to the 1970s.
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