IFNB1 and myeloid sarcoma: The importance of IFN-β in the treatment of MS has been revealed as well as its important therapeutic effects on rheumatoid arthritis, cancer and tumor have been studied.9,15 Therefore, considering the role and importance of HuIFN β in the treatment of autoimmune and inflammatory diseases such as MS and the treatment of viral infections, it is necessary to produce this drug in a better quality.