Perhaps its something like "90% percent of the individuals' immune system are successful in quick eliminating covid without any symptoms or adverse reactions".

Perhaps its something like "90% percent of the individuals' immune system are successful in quick eliminating covid without any symptoms or adverse reactions". I admit I know very little on how immunity to diseases work, but I imagine that with viruses there is a chance it'll progress to a full blown infection even if you are vaccinated in some cases.