The Polio Virus

d
First image of poliovirus in 1953.

d
http://www.americanhistory.si.edu/polio/virusvaccine/livingchem.htm



s
Source: http://www.nytimes.com/2006/03/20/international/asia/20polio.html



d
http://www.americanhistory.si.edu/polio/virusvaccine/livingchem.htm


d
http://www.americanhistory.si.edu/polio/virusvaccine/how.htm