Abstract: I look out that Diabetes mellitus is considered a common coexisting (multiple chronic conditions) of covid-19;observational studies investigating blood glucose ,or glycated hemoglobinA1c (HbA1c) according to severity of covid-19 were considered. The severe acute respiratory syndrome(SARS-CoV) and recently emerged middle east respiratory syndrome(MERS-CoV) epidemics have proven the ability of coronaviruses to cross species barrier and emerge rapidly in humans.