The definition of the word "vaccine" was literally changed during the pandemic so the mRNA injections could fit in : https://www.merriam-webster.com/wordplay/word-of-the-year-20...
Some people don't agree they should be called "vaccine", in the traditional sense.
It's gene therapy. Straight from the mouth of a member of the board of directors of Bayer: https://rumble.com/v210gyq-executive-big-pharma-bayer-stefan...?