vaccine

Overview

Meaning Now

• A substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute.

Journey

The term was coined by Edward Jenner, who discovered that exposure to cowpox (vaccinia) provided immunity against smallpox. The root 'vacca' refers to the cow, highlighting the animal origin of the early protective material.

Evolution

1. Classical Latin

   vacca

   “cow”

2. Scientific Latin (18th century)

   vaccinus

   “pertaining to a cow”

   Used in the context of variolae vaccinae (cowpox).

3. Modern English (19th century)

   vaccine

   “preparation to induce immunity”

Connections

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