Poliomyelitis is an acute viral disease spread from person to person, primarily via the oral-fecal route. Although around 90% of polio infections cause no symptoms at all, affected individuals can exhibit a range of symptoms if the virus enters the blood stream. In fewer than 1% of cases the virus enters the nervous system, preferentially infecting and destroying neurons, leading to muscle weakness and acute paralysis...
Read more about
[close]
