COVID-19(24) SARS-CoV-2(17) pandemic(16) virus(12) clinical trial(11) TMPRSS2(10) drug(10) Protein(9) Vaccine(9) approved(9) reducing(9) Trial(8) repurposing(8) receptor(8) variant(7) COVID-19 patients(7) COVID-19 patient(7) treating COVID-19 patient(7) Infection(7) ACE2(7) over(7) Neutralizing antibodies(7) Vaccines(6) addition(6) conditions(6) morbidity(6) effective(6) disease(6) coronavirus(6) Health(6)