A discussion doesn't have to end up being a fight but it often is a good way to learn.

I don't think I am mistaken, but I do know that the definition of a vaccine has been changing since Covid started.

Older definitions stated things like, "a substance used to stimulate the production of antibodies and provide immunity against one or several diseases" or "any preparation used as a preventive inoculation to confer immunity against a specific disease".

This is what the word vaccine means to most of the people in the world. The current definition, updated by the CDC on September 1, 2021 and the WHO on August 30, 2021 changed the word immunity to protection. Here is the search source so anyone can check it:

https://www.bing.com/search?q=defini...T003&scope=web

The current Covid vaccines are still listed as approved on an emergency basis and have been since December 2020. They have not been through the rigorous, lengthy clinical trials that all the other vaccines you mentioned were made to go through. They are still on "Emergency Use Authorization" by the "Thorough Evaluation of Available Safety, Effectiveness, and Manufacturing Quality Information by FDA Career Scientists, Input from Independent Experts". This is not how the other vaccines you mentioned were granted approval.

I am far from an anti-vaxxer, I am fully vaccinated. But the truth is that the promise of the Covid vaccines were over sold. From the Washington Post article November 2020:

"A vaccine won't be available immediately for everybody," says Arthur Reingold, a professor of epidemiology at the School of Public Health at the University of California, Berkeley. He also chairs California's COVID-19 Scientific Safety Review Workgroup, which will evaluate the safety and efficacy of covid-19 vaccines.

“It probably will take four to six months,” he says. “What that says to me is that people will have to keep wearing masks at least until spring. We won’t be in a magically different situation by February or March. I don’t see how that can possibly happen.”

https://www.washingtonpost.com/healt...bc9_story.html

This is what the world was being told by the same scientific community that approved the Covid vaccines for emergency use.

Add this to the common belief that vaccines offer immunity and it is not hard to tell why people question the vaccines and the experts that promote them.

And smallpox has been completely eliminated by the vaccine. 100%

From the BBC:

https://www.bbc.co.uk/news/resources...3-a4568e161c4f

Amazing results like this also led people to the false belief that the Covid vaccines would prevent Covid.