Table 4.

Summary of Testing for Individuals Postexposure to COVID-19 Cases

Goals of Testing

Identify COVID-19 cases

Reduce time of quarantine postexposure

Pretest probability: Moderate-high

Testing strategy: Test exposed individual on day 5–7 of quarantine, using Ag RDT or NAAT

Positive result: Quarantine according to local guidance.

Negative result: Quarantine may end on day 7, provided individual remains asymptomatic and acceptable by local guidance.

Abbreviations: Ag, antigen; COVID-19, coronavirus disease 2019; NAAT, nucleic acid amplification test; RDT, rapid diagnostic test.