Poliomyelitis

Poliomyelitis Poliomyelitis, is a serious infection caused by a virus. In the past, epidemics of polio were common and were greatly feared because the disease left many patients paralyzed for life (Fetzer). In the 1950’s, however, a vaccine against the disease was introduced. Since then, polio has been nearly eliminated in the developed countries. Kinds of Poliomyelitis A polio virus may attack the nerve cells of the brain and spinal cord, causing paralysis. However, infection by a polio virus does not always result in severe illness. Some patients show only mild symptoms, such as fever, headache, sore throat, and vomiting. Symptoms may disappear after about a day. Severe polio attacks begin with the same symptoms as the mild attacks. The symptoms, however, do not disappear. Stiffness of the neck and back develops. The muscles become weak, and movement is difficult. polio, vaccine, symptoms, virus, poliomyelitis, paralysis, nerve, doses, cells, however, disease, developed, viruses, two, people, patients, oral, occur, months, infection, four, form, epidemics, control, become, attack, against, years, united, states, spinal, severe, serious, sabin, results