Polio (poliomyelitis) is caused by a gastrointestinal (gut) infection with one of 3 types of polioviruses (serotypes 1, 2 or 3). Polioviruses are RNA enteroviruses from the Picornaviridae family.
Approximately 70% of polio infections are asymptomatic or present as a non-specific febrile illness. It is estimated that flaccid paralysis occurs in less than 1 percent of all polio cases.
Our new reference page details transmission routes, epidemiology and it’s prevention through vaccination.
To view the page in full follow the below link: