Essay about History of Vaccines: Poliomyelitis

Essay about History of Vaccines: Poliomyelitis

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I. Causative agents
Polio (also called poliomyelitis) is a highly contagious disease that is caused by a virus that attacks the nervous system. Children younger than five years old are more likely to get this virus than any other age group. The symptoms of polio are rarely seen. There are different kinds of polio and each one of them has different symptoms. Non-paralytic polio symptoms last only for about two days to a week and include: fever, sore throat, headache, vomiting, fatigue, problem swallowing/breathing, and spasms. The symptoms of paralytic polio include first the symptoms of non-paralytics polio and then loss of reflexes, severe muscle pain and spasms, spine weakness, sudden paralysis, and deformed limbs (mostly of ankles and feet). The symptoms of abortive polio include continuous muscle and joint weakness, muscle atrophy, sleep apnea, and becoming easily cold. ( The virus invades local lymphoid tissues, then enters the bloodstream, and infects the cells of the nervous system. This virus enters a person’s body through the mouth and is present in the throat. (
Polio is caused by a virus called poliovirus. This is an RNA virus; it colonizes the gastrointestinal tract (mouth to intestines). ( Poliovirus is often transmitted from person-to-person through fecal matter. People who live in places with limited resources, contaminated water, and non-flush toilets are often the ones that are infected with this virus. Also people drink water that has been contaminated human waste, and that leads to polio. ( Poli...

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... to cause vaccine-associated paralytic poliomyelitis (VAPP). That’s why it is recommended that the OPV not be given routinely and that only IPV be given (

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6. for definition for glossary

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