COVID-19(42) SARS-CoV-2(22) Infection(16) outbreak(15) reduce(14) country(12) risk(12) effective(12) Transmission(11) Intervention(10) Health(10) Vaccine(10) approach(10) Analysis(10) Spread(10) outcome(10) pandemic(10) age(9) COVID-19 pandemic(9) the epidemic(9) coronavirus(8) reducing(8) virus(8) Measures(8) group(7) vaccination(7) disease(7) Community(7) Contact(7) Local(7)