So you are saying vaccines are useless because viruses mutate? Then how do other vaccines for smallpox, polio, etc. work?
I guess the difference between the poliovirus and SARS/flus/colds is the rate of mutation. It's take a long time for a mutated variant of the poliovirus to be detected. With SARS (COVID), we're quickly running out of Greek letters for the variants, although skipping letters like "Xi" is speeding up the process.
"Fortunately for humanity, smallpox is a pox virus which is a family of viruses which uses DNA as its genome. Because of this, the smallpox genome has remained relatively stable over the past 1000 years." (in the middle of Question #1)
https://www.dmu.edu/blog/2021/02/covid-19-the-more-things-change-the-more-they-stay-the-same/
good question
Polio vaxx gave kids polio
To the best of my knowledge, small pox and polio do not have animal hosts.
The covid vaccines approved in the US only target the spike protein. It’s giving your home security system a picture of a robber and saying, “just keep him from doing any damage with a hammer if he comes in.” So from the beginning the vaccinated were turned into Typhoid Marys. If the robber changes his appearance in small ways or gets a different weapon, he can start doing damage again. In fact, the US vaccines create pressure on the robber to focus on changing his appearance and adapting weapons. Other vaccines and natural immunity look at all the aspects of the break in, means of access, etc. So they may not be as good at stopping a very specific robber with a specific weapon from from doing damage, but they are better at stopping transmission and addressing variants. The big question is if the specificity of the the US vaccines will also weaken broad natural immunity after 6 months and in the long term.