Figure 2: Kinetic viral loads in respiratory secretions and blood of MERS patients.

Changes of average viral loads in respiratory and plasma samples are presented. The patients were classified into group I ~ IV (G I ~ IV) based on disease severity and mortality as described in the text. Gray boxes indicate the average periods of antiviral therapy administered to the patients of each group. P09 in group III received convalescent plasma therapy twice on days 10 and 16 after symptom onset.