are making people sick. There immune systems have tanked . We are exposed to viruses all the time we are exposed to covid almost daily if we interact with groups. our bodies fight them off 99% of the time . If we are weakened or in an environment that is saturated for a long period of time our immune system can’t keep up. The daily exposures we fight off strengthen our immune systems. My theory explains why so many get the disease over and over again despite their rigorous mitigation attempts.