Introduction                    
myelitis(polio) is an infectious viral disease which usually affects young children. In this review paper i will discuss how polio is transmitted, how it invades the nervous system and cause paralysis, epidemiology, clinical signs and symptoms of affected individuals, diagnosis, prevention and treatment of such patients. I will also discuss the challenges faced with the global ambition of completely irradiating polio disease despite the availability of an effective vaccine.

Discussion(Body)                
is a disabling and life threatening disease caused by the poliovirus.

virus is transmitted from person to person and causes paralysis by infecting a person spinal cord (WHO,2019)

 

Transmission  
It is very contagious and it is transmitted through person to person contact. It lives in an infected person throat and intestines. It enters the body through the mouth and spread through contact with feces of infected people or droplets from a sneeze or cough of an infected person(CDC,2019).

Infected people can spread the virus to others immediately before and up to 2 weeks after symptoms appear. People who do not have symptoms can still pass the virus to others and make them sick (CDC, 2019)

Signs and symptoms of polio  
Most people who get infected with poliovirus will not have any visible symptoms.1 out of 4 people with poliovirus will have flu like signs that may include sore throat, fever, tiredness, nausea, headache(CDC, 2019).

The symptoms usually last 2 to 5 days then stop on their own.

A smaller proportion of people that have poliovirus infection will develop more serious symptoms including paresthesia, meningitis, and paralysis.

Paralysis is the most dangerous symptom associated with polio because it can cause permanent disability and death. Between 4 to 10 out of 100 persons who have paralysis from poliovirus die. This is because the virus affects the muscles that help with breathing. 

Even kids who seem to fully recover can develop new muscle pain, weakness, or paralysis as adults, 15 or 40 years later. This is called post-polio syndrome. (CDC, 2019)

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