That's not a vaccine, though it is a step in that direction, from inoculation.
It reflects the discovery that cowpox and smallpox are closely enough related that having survived an infection with one, gives immunity to both. Cowpox, being milder than smallpox, meant that one could effectively be inoculated against smallpox by having them suffer through a less serious disease to achieve it.
Still not a true vaccine, which is based on the use of a weakened form of the pathogen, to create immunity without the need to suffer through the actual disease.
You sound like Bill Clinton when he said "it depends on what you mean the meaning is"
A vaccine by your narrow definition is a weakened form of the pathogen that will stimulate the immune system against the pathogen. I don't argue that.
What is the purpose of a vaccine? To stimulate the immune system against the pathogen..
Every scientist refers to the discovery of using a weakened version of a cowpox to stimulate the immune system against the pathogen small pox as a vaccine, except you.. Since it stimulates the immune system against the pathogen. Since the purpose and result is the same as a vaccine, most people compare it to vaccines.
The vast majority of scientists refers to the discovery of using mRNA to stimulate the immune system against the pathogen COVID, or any othe mRNA use to stimulate immunity, as a vaccine, except you and a few scientists who are trying to prove the earth is flat.. Since it stimulates the immune system against the pathogen. Since the purpose and result are the same as a vaccine, most people compare it to vaccine.
You do not have the ability to understand the advance is science and many other things.
Your world stopped some years ago, and you define today's world using your understanding of the past and no knowledge that has been produced since.
Those who live in the past have a hard time in living in the present. That is a majority of the MAGA followers quit increasing their knowledge years ago. Probably because they cannot handle too much knowledge.
They are angry and freightened of the present world because they have not brought in new knowledge to understand the present.