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Table 1.

Serial analysis of plasma SARS-CoV RNA concentrations in SARS patients by the RT-PCR system for the polymerase region.1

PatientsPlasma SARS-CoV concentration, copies/mL
Day 1Day 7Day 14
1298Undetectable173
2231363Undetectable
3UndetectableUndetectableUndetectable
4UndetectableUndetectable100
5239170Undetectable
6UndetectableUndetectableUndetectable
7Undetectable8565Undetectable
8230819Undetectable
9125413Undetectable
10UndetectableUndetectableUndetectable
1140484Undetectable
12UndetectableUndetectable153
Detection rate50%50%25%
1The detection limit of the assay is 74 copies/mL. Day 1, day 7, and day 14 denote the days after fever onset. The nucleocapsid RT-PCR system has a higher detection sensitivity (see text).
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