COVID-19(45) SARS-CoV-2(25) pandemic(16) Infection(12) Analysis(11) information(10) virus(10) Spread(10) wastewater(9) less(9) Concentration(9) reduction(9) Ventilation(9) risk(9) Probability(8) highest(8) investigated(8) applied(8) increased risk(7) drug(7) age(7) predict(7) explain(7) SARS-CoV-2.(7) individual(7) Sex(7) reduced(7) reduce(7) coronavirus(7) Mortality(6)