https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3582124/ Hard to know whether vaccines are working or the immune system is defeating this virus. Our young unvaccinated control group is being vaccinated now and with 100,000 infections in children under the age of 10 and only 3 deaths, their immune system responded well without help from a vaccine.
Old people with weak immune systems will continue to die regardless of how many vaccines they have. There is only so many times you can patch an old tyre before they blow out.
