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Polio is a disease caused by infection with the poliovirus. The virus spreads by:
- Direct person-to-person contact
- Contact with infected mucus or phlegm from the nose or mouth
- Contact with infected feces
The virus enters through the mouth and nose, multiplies in the throat and intestinal tract, and then is absorbed and spread through the blood and lymph system. The time from being infected with the virus to developing symptoms of disease (incubation) ranges from 5 to 35 days (average 7 to 14 days). Most people do not develop symptoms.
francis1897 answered the question on August 24, 2022 at 06:57