One study of a hospital-based outbreak of MERS had an estimated incubation period of 5.5 days (95% confidence interval 1.9 to 14.7 days).[7] MERS can range from asymptomatic disease to severe pneumonia leading to acute respiratory distress syndrome (ARDS).[6] Kidney failure, disseminated intravascular coagulation (DIC), and pericarditis have also been reported.[8]