Lee 2020.

Study characteristics
Study design	Cohort study (single‐arm, not controlled)
Objectives	To show that Singapore’s strategy of using a comprehensive surveillance system has been effective in containing spread of COVID‐19
Study details	Singapore, n = 4000
Interventions	Isolation of suspected and confirmed cases in hospital Contact tracing Close contacts were placed under mandatory quarantine (14 days) Lower‐risk contacts were put on phone surveillance Additionally: several health care, border control and social measures
Notes