Hepatitis B is spread through contact with blood or other. read more or hepatitis B Hepatitis B, Acute Acute hepatitis B is inflammation of the liver that is caused by the hepatitis B virus and that lasts from a few weeks up to 6 months. Hepatitis A is usually spread when people ingest something that has. read more, hepatitis A Hepatitis A Acute hepatitis A is inflammation of the liver that is caused by the hepatitis A virus and that lasts less than 6 months. Symptoms vary, but the most common are extreme fatigue, fever, sore throat. read more, Epstein-Barr virus Infectious Mononucleosis Epstein-Barr virus causes a number of diseases, including infectious mononucleosis. Enterovirus infections affect many parts of the body and may be caused by any of several different viral strains. The viruses most often involved include enteroviruses Overview of Enterovirus Infections Enteroviruses are a group of viruses. read more except that symptoms do not come and go as they do in multiple sclerosis. read more, resembles multiple sclerosis Multiple Sclerosis (MS) In multiple sclerosis, patches of myelin (the substance that covers most nerve fibers) and underlying nerve fibers in the brain, optic nerves, and spinal cord are damaged or destroyed. Demyelination is the destruction of the tissues that wrap around nerves, called the myelin. The resulting disorder, called acute disseminated encephalomyelitis Acute Disseminated Encephalomyelitis (ADEM) Disorders that cause demyelination and have no known cause are called primary demyelinating disorders. As a result, nerve transmission becomes very slow. The attack occurs because proteins in myelin resemble those in the virus. What triggers an autoimmune disorder is not known. read more ) in the brain and spinal cord-an autoimmune reaction Autoimmune Disorders An autoimmune disorder is a malfunction of the body's immune system that causes the body to attack its own tissues. After people have certain viral infections or get certain vaccines, the body’s immune system sometimes attacks the layers of tissue that wrap around nerve fibers (called the myelin sheath Overview of Demyelinating Disorders Most nerve fibers inside and outside the brain are wrapped with many layers of tissue composed of a fat (lipoprotein) called myelin.
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