IFNB1 and COVID-19: Following ICU administration and confirmed diagnosis of COVID-19, considering critical condition of the young patient, plasmapheresis was performed once on a daily basis, three doses of interferon beta(IFN-β-1b) was injected subcutaneously every other day and dexamethasone was given at a dose of 4 mg every 8 hours along with common antiviral regimen.