Figure 1

The antibody (IgG) response to Middle East respiratory syndrome (MERS) coronavirus among critically ill patients. Results are expressed as optical density ratio (OD ratio). To account for the fact that repeat antibody testing was not performed after ICU discharge, we carried forward the OD ratio up to day 28 or death whichever came first. Box plots are displayed for the ranks with medians and quartiles 1 and 3. The error bars refer to 1.5*IQR.