From: A comparison of SARS-CoV-2 rapid antigen testing with realtime RT-PCR among symptomatic and asymptomatic individuals
Mild
Ct Range
Moderate
Hospitalised
Asymptomatic
True positive (n = 112)
8
17.3–29.7
83
15.3–31.7
19
17–30.7
2
27.4–30.6
False negative (n = 37)
21–27.7
3
26.5–32
4
25.3–30.6
22
27–32.9