Studies on the Extremes of COVID-19

摘要

Asymptomatic confirmed cases shed virus longer and have a weaker, shorter-lived immune response than symptomatic ones, whereas the severest cases are most often seen in individuals with blood type A. During the 6 months that COVID-19 has wreaked pandemic havoc on the world's population, much remains to be known about this disease, yet much has already been learned. Now, two studies shed some light on pathophysiology at both extremes of the COVID-19 spectrum.