COVID-19(28) SARS-CoV-2(14) pandemic(11) severity(10) age(10) Infection(10) risk(10) Spread(9) Treatment(8) virus(8) effective(8) Brazil(8) adjusted(7) disease(7) men(7) analyzed(7) death(7) Mortality(7) Patient(7) male(7) coronavirus(7) Prognosis(6) psychological Impact(6) Transmission(6) Replication(6) Vaccine(6) Evolution(6) Analysis(6) candidate drug(6) conducted(6)