What Are the Signs and Symptoms of Polio?
When a person becomes infected with poliovirus, the virus begins to multiply within the cells that line the back of the throat, nose, and intestines. Symptoms usually appear 7 to 14 days after a person becomes infected with the poliovirus. This period between polio transmission and the start of polio symptoms is called the “polio incubation period.” The incubation period for polio can be as short as 4 days or as long as 35 days.
