COVID‐19(11) COVID‐19(9) pandemic(7) pandemic ethics(7) distribution(6) COVID-19(6) Healthcare system(6) Vaccine(5) Ethics(5) vaccination ethics(4) Stopping(3) measure(3) Triage(3) Effectiveness(3) populations(3) criteria(3) determine(3) current(3) exacerbating(3) appear(3) healthcare(3) second(3) significantly higher(3) immunization(3) trade‐off(3) prioritization(3) PROTECT(3) expected(3) include(3) healthcare worker(3)