Silver Book Fact
Polio vaccination prevented 5 million cases of paralysis since 1988
Vaccination for polio reduced the number of worldwide cases from more than 300,000 per year in the 1980s to only 2,000 in 2002—also preventing an estimated 5 million cases of paralysis since 1988.
Bloom D, Canning D, Weston M. The Value of Vaccination. World Economics. 2005; 6(3): 15-39. http://www.who.int/immunization_supply/financing/value_vaccination_bloom_canning_weston.pdf