• n. 疫苗；牛痘苗
• adj. 疫苗的；牛痘的

来自拉丁语vacca,母牛，可能来自拟声词，词源同vaquero.疫苗义来自1800年，英国医生Edward Jenner发现了预防天花的技术，即通过把提取的牛痘病毒疫苗注射入健康人体内使之产生抗体，以激发人体的免疫系统，从而达到预防天花的目的。

vaccine

vaccine: [18] Vaccine was adapted from Latin vaccīnus, which means literally ‘of a cow’ (it was a derivative of vacca ‘cow’, source of French vache). It was used by the British physician Edward Jenner at the end of the 18th century in the terms vaccine disease for ‘cowpox’, and hence vaccine inoculation for the technique he developed of preventing smallpox by injecting people with cowpox virus. The verb vaccinate was coined from it at the beginning of the 19th century, but vaccine itself was not used as a noun, meaning ‘inoculated material’, until the 1840s.

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.

1. At present, no widely approved vaccine exists for malaria.

目前，还没有被广泛认可的疟疾疫苗。

来自柯林斯例句

2. Seven million doses of vaccine are annually given to British children.

英国孩子每年要接种7百万剂疫苗。

来自柯林斯例句

3. Roll on the day someone develops an effective vaccine against malaria.

盼望有一天有人会研制出一种能有效预防疟疾的疫苗。

来自柯林斯例句

4. The monkeys had been immunized with a vaccine made from infected cells.

这些猴子已经注射了由受感染的细胞培养而成的疫苗。

来自柯林斯例句

5. This vaccine is not normally provided free under the NHS.

这种疫苗在国民医疗保健系统中通常不是免费提供的。

来自柯林斯例句