RADTs are less sensitive than NAATs, especially in asymptomatic patients.The predictive value of RADTs is highest in settings where SARS-CoV-2 prevalence is high.RADTs are sensitive enough to detect cases with high viral load, early in the course of infection in pre-symptomatic and early symptomatic cases up to five days from symptom onset.RADTs can help reduce further transmission through early detection of highly infectious cases, enabling a rapid start of isolation and contact tracing.Rapid antigen detection tests (RADTs) can contribute to overall COVID-19 testing capacity, offering advantages in terms of shorter turnaround times and reduced costs, especially in situations in which Nucleic Acid Amplification Testing (NAAT) capacity is limited.
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