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Polio Transmission

Oral-Oral Polio Transmission
Less commonly, polio transmission occurs through contact with respiratory droplets or saliva. When an infected person sneezes or coughs, droplets spray into the air. The infected mucus or saliva can land in other people's noses or throats when they breathe or put their fingers in their mouth, nose, or eyes after touching an infected surface.

Polio Transmission and Polio Symptoms

Following polio transmission, a person does not immediately become sick. Once the poliovirus enters the body, it travels to the back of the throat, nose, and intestines, where it begins to multiply and travel to other parts of the body. After 7-14 days (on average), symptoms of polio can begin. This period between polio transmission and the beginning of polio symptoms is called the polio incubation period. The polio incubation period can be as short at 4 days or as long as 35 days.
(Click Polio Symptoms for more information about the symptoms of polio.)

Polio Information

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