Multiple sclerosis appears to be caused by a chemical found naturally in the body called interferon gamma. Under normal circumstances this chemical helps to activate the immune system to attack foreign invaders, such as viruses and bacteria.In multiple sclerosis patients interferon gamma causes the immune system wrongly to identify body cells are foreign invaders.As a result, the myelin sheath coating nerves in the brain and spinal cord is destroyed by mistake.As a …showed first 75 words of 409 total…

…showed last 75 words of 409 total…patient per year - some health authorities are reluctant to allow it to be prescribed. Short term side effects vary depending on the type of beta interferon used, but may include inflammation at the site of the injection and flu-like symptoms. Some people have reported depression. It is too early to tell what the long tem side effects will be. The patient's health - and response to treatment - will be monitored by a doctor.