Whether fulminant hepatitis is contagious to others depends on the cause of the disease. If it is caused by hepatitis B virus, it will be infected to others; if it is caused by drugs or autoimmune liver disease, it will not be infected to patients. 1. Hepatitis B virus: In China, the primary factor causing fulminant hepatitis is hepatitis B virus, which is contagious, so the fulminant hepatitis caused by it is also contagious and can be transmitted to others. 2. Other common causes: drug liver injury, autoimmune liver disease, ischemic liver injury caused by shock or hypotension may cause fulminant hepatitis, because the above diseases are not contagious, so this kind of fulminant hepatitis will not be infected to others. If the diagnosis of fulminant hepatitis is confirmed, it is recommended to carry out standardized treatment as soon as possible to reduce the adverse effects of the disease.