You are referencing an outdated definition.
See here:
https://freerepublic.com/focus/chat/3948957/posts?page=44#44
And view most recent (which was modified between January 8-16 of THIS YEAR) here:
https://www.merriam-webster.com/dictionary/vaccine
You are referencing an outdated definition.
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You have got to be kidding. The second definition was from a medical dictionary. Changing definitions changes the truth.... changed no doubt to calm down the masses over the covid hoax.