COVID-19(9) COVID-19 pandemic(8) outcome(7) age(7) Infection(7) SARS-CoV-2(7) Factor(4) SARS-COV-2 infection(4) Population screening(4) consequence(4) term(4) Host(4) Course(4) death(4) demonstrated(4) General population(4) CD27(4) population distribution(4) Mutation(4) transmembrane(4) variant(4) Data mining(4) acquisition(4) FIVE(4) Protein(4) supported(4) epidemiological data(4) distribution(4) cure(4) TMPRSS2(4)