The National Foundation for Infantile Paralysis's typing program confirmed the existence of three main serotypes of poliovirus, since known as type 1, type 2, and type 3
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The National Foundation for Infantile Paralysis's typing program confirmed the existence of three main serotypes of poliovirus, since known as type 1, type 2, and type 3
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.