I have considered that the reason for the adverse reactions to the C-virus vaccine has been the result of something wrong with a very small number of people's immune system. What is actually going on remains for the research ahead. I am certain it won't take long for the answers. I bet those answers will reveal actions in the immune system that cause other problems and possible cures.
Indeed, and this is seen with everything. It’s the entire reason we see some most people surviving COVID-19 with mild symptoms or no symptoms at all, while 0.65 - 1% of people die from it: differences in the immune system. Even with vaccination, nothing is ever certain. But we don’t need a perfect vaccine to achieve a perfect result. The smallpox vaccine is 95% effective. That imperfect vaccine wiped smallpox off the face of the Earth. The last case documented was in 1978. The vaccine was so effective, we don’t even vaccinate against it anymore.