How do you divide poliomyelitis?

Poliomyelitis is divided into three main types based on the serotype of the poliovirus: type 1, type 2, and type 3. These types differ in their genetic structure and epidemiological characteristics, but all can cause similar clinical symptoms, primarily affecting the nervous system and leading to paralysis. Additionally, poliomyelitis can be classified into two forms: non-paralytic (mild illness) and paralytic (severe illness, which can lead to lasting disability). Vaccination efforts focus on preventing all types to achieve global eradication.