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Serial analysis of plasma severe acute respiratory syndrome (SARS)-coronavirus (CoV) RNA levels in pediatric SARS patients. Plots of plasma SARS-CoV RNA levels (y-axis) against time after the onset of fever (d 1 refers the day of fever onset) (x-axis). The duration of fever and the periods of steroid and ribavirin treatment are indicated for each case. The arrows in patient 2 indicate the time of intravenous methylprednisolone treatment.
