The cause of polio is an infection with the poliovirus. When
a person is infected with poliovirus, the virus resides in the intestinal tract
and mucus in the nose and throat. Poliovirus is usually spread through contact
with stool of the infected person. Less frequently, polio is spread through contact with infected respiratory secretions or saliva.
a person is infected with poliovirus, the virus resides in the intestinal tract
and mucus in the nose and throat. Poliovirus is usually spread through contact
with stool of the infected person. Less frequently, polio is spread through contact with infected respiratory secretions or saliva.