Two Strains of Polio Down, One to Go - Scientific American

1. Two Strains of Polio Down, One to Go  Scientific American
2. Two Strains of Polio Are Gone, but the End of the Disease Is Still Far Off  The New York Times
3. Two out of three wild poliovirus strains eradicated  World Health Organization
4. Join Rotary in the fight against polio  Thegardenisland.com
5. Area Rotary presidents speak out on World Polio Day  Winchester Herald Chronicle
6. View full coverage on Google News