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Table 1 Detection and quantitation of SARS-CoV RNA by RT-PCR in sera.

From: Using patient-collected clinical samples and sera to detect and quantify the severe acute respiratory syndrome coronavirus (SARS-CoV)

Days after onset Samples Positive (number, %) Viral load (log10 copies/ml ± SD)
1–4 76 38 (50) 2.74 ± 0.88
5–9 154 87 (56.5) 2.78 ± 1.04
10–14 129 39 (30.2) 2.58 ± 1.02
15–19 88 24 (27.3) 2.27 ± 0.85
20–24 24 4 (16.7) 2.11 ± 1.04
≥25 143 0 -
Total 614 192 (31.3) 2.65 ± 0.99