Mild reinfection without symptoms (& in all likelihood, decreased shedding) is functionally nearly the same as actual "immunity". In a dynamic long-term analys

Mild reinfection without symptoms (& in all likelihood, decreased shedding) is functionally nearly the same as actual "immunity". In a dynamic long-term analysis, such mild reinfections might even be for-the-best: it refreshes your immune response, and those around you in a similar situation, as if the virus itself had been turned into a naturally-circulating seasonal "booster shot". What if the other four known 'common cold' coronaviruses were all just as challenging as Covid-19 when they emerged... but nowadays, everyone gets them 1st when young – & their immune system most able to adapt – thus rendering them relatively mild, or even undetectable, on all subsequent re-exposures over an entire lifetime?