"vaccines are made from the virus itself, either weakened or killed, which will induce antibodies to bind and kill a live virus. Measles vaccines are just that, weakened (or attenuated) measles viruses. —Ann Finkbeiner et al."
The Covid shot DOES NOT FIT!
Unfortunately, most of the internet searches have been updated to ignore this medical definition and replaced it with a political definition.
“Vaccine has a medical definition. The Covid shot dose not fit....at all!”
Buy up old dictionaries and encyclopedia at thrift stores so there’s still truth to be seen.