COVID-19(20) country(9) Analysis(8) COVID-19 pandemic(8) pandemic(7) virus(7) parameter(6) Epidemic(6) COVID-19 case(6) Government(5) Evolution(5) sensitivity(5) Infection(5) measure(5) approach(5) coronavirus disease(5) cumulative(4) highlighting(4) coronavirus(4) Perturbation(4) infected individual(4) death(4) Novel coronavirus(4) explain(4) growth(4) the epidemic(4) reported(4) mathematical(4) outbreak(4) identify(4)