Coronaviruses, members of the Coronaviridae family and the Coronavirinae subfamily, are found in mammals and birds. Coronaviruses are divided into four genera: α, β, γ and δ. The human coronaviruses HKU1 (strain named after discovery in the Hong Kong University), OC43 (labeled with OC because these viruses are grown in ‘Organ Culture'), SARS-CoV and MERS-CoV belong to the genus β. SARS-CoV and MERS-CoV are genetically subgrouped into lineages B and C, respectively. MERS-CoV mainly causes respiratory diseases and systemic disorders. Gastrointestinal symptoms, including diarrhea and queasiness, are also occasionally observed., Most MERS-CoV-infected individuals develop chronic comorbidities such as renal failure, diabetes and cardiac disease, resulting in high fatality rates in patients with a history of diabetes and renal failure.The median age of patients in reported cases is 49 years, and the incubation period ranges between 2 and 13 days, with a median of 5 days.