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COVID-19 can be severe, and has caused millions of deaths around the world as well as lasting health problems in some who have survived the illness. In response, Allfree confirmed…

North Korea’s Suspected Covid

Different combinations of those two factors will drive varying levels of conferred immunity, implying the extent of natural immunity that will be required to reach herd immunity under each scenario….

Find Covid

They aren’t accounted for in the calculations that are supposed to keep the country from hurtling back into another, unmanageable bout with COVID. Surge, Kelley Cabrera, a nurse based in…