That was going to happen regardless. If a virus spreads through a population it is essentially the same as everyone getting vaccinated. If it is the sort of virus like smallpox that takes hundreds of years or more to mutate, then the virus dies out in the wild if everyone who is still alive has immunity. If it is a variety that can mutate faster, but has only a limited number of effective options, like polio, then it can still be wiped out. If it mutates quite fast and has multiple effective options, then it can keep surviving. Coronaviruses would generally fall into this category. Some, like SARS-CoV, wipe themselves out by being too deadly.Yes, vaccine decreases the chances of hospitalisation and death, but the primary reason for the vaccine was to "stop the spread". Omicron and delta has already proved to bypass the vaccine treatment easily, and the waining effect of immunity and transmission within vaccinated people leads to a potentially severe issue of virus mutations that will be more deadly for unvaccinated populations including those who cannot be vaccinated.
The gist of it is that this particular coronavirus was going to infect and mutate with or without vaccines. There is no reason to assume that the result would increased deadliness.
Depends on what you mean by effective. But ultimately the MERS vaccines were never approved because there simply were not enough cases for proper testing and release.This was warned against by multiple health professionals but their voices were shut out, ridiculed and banned. In 2008 a study on the viability of a vaccine against the MERS Corona virus found that the vaccine would only be effective for 6months, this study was ignored by almost everyone.
Pathogenic priming can happen from both infection and vaccines.
You can't have herd immunity unless most people are vaccinated. So if herd immunity were possible then it would be the fault of those who choose not get vaccinated that there is no herd immunity. In this case though herd immunity is probably impossible anyway.I think that this issue only serves to highlight the selfishness of humans. Vaccinated people believed that if they took the shot everything would go back to normal there would be forced 'herd immunity'. Now they are blaming unvaccinated people for that not happening