vaccine

[ vak-seen or, especially British, vak-seen, -sin ]

See synonyms for vaccine on Thesaurus.com

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noun

any preparation used as a preventive inoculation to confer immunity against a specific disease, usually employing an innocuous form of the disease agent, as killed or weakened bacteria or viruses, to stimulate antibody production.

the virus of cowpox, used in vaccination, obtained from pox vesicles of a cow or person.

The definition above agrees with my Follett Vest Pocket Webster Dictionary, 1965 edition.  No mentions of gene therapy or RNA.

I'll Drink To That

 Here's to cheating, stealing, fighting, and drinking.

If you cheat, may you cheat death.
If you steal, may you steal a woman's heart.
If you fight, may you fight for a brother.
And if you drink, may you drink with me.
-An Irish Drinking Toast-