Poliomyelitis (Polio) – National Collaborating Centre for Infectious Diseases
Poliomyelitis (Polio) | Health | Province of Manitoba
Poliomielite - Wikipedia
Poliomyelitis - PAHO/WHO | Pan American Health Organization
Medicina, malattia, poliomielite, vaccino antipolio di 'Cutter Laboratories', causa di uno scandalo di droga nel 1955 attraverso la contaminazione con virus della polio, su: 'Zeit im Bild', numero 52, Dresda, 1963, diritti
Poliomyelitis: MedlinePlus Medical Encyclopedia Image
Poliomyelitis strain spreads to China: Is U.S. at risk? - CBS News