Corona virus 8/18/20 - Preventive Medicine Center

In the regions hit hardest by COVID-19, serology studies show . new cases and deaths peaked at around 10-20%. infected.13/ Adding. the 50% who already had T cell immunity from common cold viruses to the newly infected 10-20% . equals about 60-70% immunity. Not coincidentally, 60-70% is the percentage epidemiologists project is . necessary for ... ................
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