Vaccine
来自Big Physics
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late 18th century: from Latin vaccinus, from vacca ‘cow’ (because of the early use of the cowpox virus against smallpox).
wiktionary
From Latin vaccīnus, from vacca(“cow”) (because of early use of the cowpox virus against smallpox). Compare New Latin variola vaccīna(“cowpox”).
etymonline
vaccine (n.)
"matter used in vaccination," 1846, from French vaccin, noun use of adjective, from Latin vaccina, fem. of vaccinus "pertaining to a cow" (see vaccination). Related: Vaccinal; vaccinic.
