COVID-19(15) risk(8) country(6) Epidemiology(6) risk factor(6) age(6) objective(6) Result(6) Characteristics(6) death(5) Infection(5) explained(5) confidence interval(5) 95% CI(5) Sex(4) Nurse(4) occupational exposure(4) work from home(4) healthcare worker(4) older population(3) defined(3) risk of COVID-19(3) Netherland(3) classification(3) Mortality(3) agreement(3) Factors(3) exposure to(3) driver(3) population study(3)