Viruses mutate all the time, and if you have a vaccine that doesn't block infection completely, then the virus will mutate to evade the immune response within that person. That is one of the distinct features of the COVID shots — they're not designed to block infection. They allow infection to occur and at best lessen the symptoms of that infection
In an unvaccinated person, the virus does not encounter the same evolutionary pressure to mutate into something stronger. So, if SARS-CoV-2 does end up mutating into more lethal strains, then mass vaccination is the most likely driver
So far, SARS-CoV-2 variants are at most 0.3% different from the original Wuhan virus. Such minor variation means the virus will not present itself as a new virus. If you've recovered from COVID-19, your immune system will still recognize it
Will COVID shots drive the mutation of SARS-CoV-2, creating ever more variants? Or are the mutations primarily occurring in unvaccinated people? In the video report above, The Last American Vagabond host dives into the scientific research to find out.