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Kaplan-Meier curves for the time from isolation to first RT-PCR result with Ct value at 33 or above among imported COVID-19 cases identified in Hong Kong by: (A) presence of symptoms; (B) moment of detection; (C) type of SARS-CoV-2; (D) vaccination status including receipt of mRNA vaccination (BNT162b2), inactivated vaccine (CoronaVac), or other vaccine types.
