Polio is a viral disease which may change the spinal cord causing muscle weakness and paralysis. The polio virus enters the body through the mouth, usually from hands impure with the stool of an infected person. Polio is more common in infants and young children and occurs under conditions of poor hygiene. Paralysis is more regular and more severe when infection occurs in older individuals. Polio is spread when the stool of an infected person is introduced into the mouth of another person through impure water or food.
Oral-oral transmission by method of an infected person's spit may account for some cases. Patients are mainly infectious from seven to ten days before and after the onset of symptoms. However, patients are potentially infectious as long as the virus is present in the throat and feces. The virus persists in the throat for just about one week after the onset of illness and is excreted in the feces for three to six weeks. In up to 95 percent of people affected with polio have no symptoms. However, infected persons without symptoms can still extend the virus and cause others to develop polio.
About four to five percent of infected public have minor symptoms such as fever, muscle weakness, headache, nausea and vomiting. One to two percent of infected persons expand severe muscle pain and stiffness in the neck and back. Less than one percent of polio persones result in paralysis. The incubation period is commonly six to 20 days with a variety of three to 35 days. It is three types of polio virus. Lifelong protection usually depends on which type of virus a person contracts. Second attacks are exceptional and result from infection with a polio virus of a different type than the first attack.
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Oral-oral transmission by method of an infected person's spit may account for some cases. Patients are mainly infectious from seven to ten days before and after the onset of symptoms. However, patients are potentially infectious as long as the virus is present in the throat and feces. The virus persists in the throat for just about one week after the onset of illness and is excreted in the feces for three to six weeks. In up to 95 percent of people affected with polio have no symptoms. However, infected persons without symptoms can still extend the virus and cause others to develop polio.
About four to five percent of infected public have minor symptoms such as fever, muscle weakness, headache, nausea and vomiting. One to two percent of infected persons expand severe muscle pain and stiffness in the neck and back. Less than one percent of polio persones result in paralysis. The incubation period is commonly six to 20 days with a variety of three to 35 days. It is three types of polio virus. Lifelong protection usually depends on which type of virus a person contracts. Second attacks are exceptional and result from infection with a polio virus of a different type than the first attack.
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