In areas within a country with no circulation: test all suspected cases to detect first cases in new areas/settings
In health care facilities: focus testing to ensure IPC measures are correctly implemented
If therapeutics become available: test suspected patients who are eligible for therapy
In settings of limited resources in areas with community transmission, prioritize:

People at risk of developing severe disease
Vulnerable populations, may require hospitalization and advanced care
Symptomatic health workers (including emergency services and non-clinical staff)
First symptomatic individuals in a closed setting (e.g., schools, long-term living)