HSCT was believed to be effective to them, as Intan's investigation revealed a survival rate of 72% regarding IL2RG/JAK3 SCID.[46] Interferon α-2a is usually used in the treatment of hepatitis viruses or malignancy for its powerful antiviral effect.[47–49] However, there have been few previous publications on the use of interferon alpha-2a in CAEBV patients. Here, IL2RG is linked to hepatitis A virus infection.