Figure 5. MN antibody titers of serum collected from MERS-CoV patients, by patient, severity group, and days since illness onset (day 0), Saudi Arabia, August 1, 2015–August 31, 2016. A) Group 1 patients; B) group 2 patients; C) group 3 patients. The dashed line represents the limit of detection, below which specimens were considered not to have detectable antibodies. Pt 11 did not report any symptoms throughout their illness. Pt 30 was hospitalized and mechanically ventilated before MERS onset because of a road traffic accident. *Patients with documented history of diabetes mellitus. MERS-CoV, Middle East respiratory syndrome coronavirus; MN, microneutralization assay; ND, antibodies not detected; Pt, patient.