What to Know About Polio: Vaccines, Symptoms and How It Spreads - The New York Times
Vaccine preventable diseases: Polio - PAHO/WHO | Pan American Health Organization
Polio vaccine boosters are offered to London children as the virus spreads : NPR
Improvements in Polio Vaccination Status and Knowledge about Polio Vaccination in the CORE Group Polio Project Implementation Areas in Pastoralist and Semi-Pastoralist Regions in Ethiopia in: The American Journal of Tropical Medicine
Recommended Immunization Schedules for Persons Aged 0 Through 18 Years --- United States, 2010
Number of polio cases according to age, severity a and social class,... | Download Table
The role of older children and adults in wild poliovirus transmission | PNAS
Quantifying the Impact of Expanded Age Group Campaigns for Polio Eradication | PLOS ONE
The age of polio: recalling another viral terror - Climate Online