Fig 3. (a–f) Pooled sensitivity and specificity by IFU conformity, Ct-value*, sample type, symptom status, duration of symptoms, and age.

*Low Ct-values are the RT-PCR semiquantitative correlate for a high virus concentration, only sensitivity calculated. AN, anterior nasal; CI, confidence interval; IFU, instructions for use; MT, mid-turbinate; N, number of; NP, nasopharyngeal; RT-PCR, reverse transcription polymerase chain reaction.