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R. Bruce Aylward, MD, MPH and David L. Heymann, MD

The authors are with the Polio Eradication Initiative, World Health Organization, Geneva, Switzerland.

View larger version (51K): [in a new window]   FIGURE 1—— Distribution of endemic poliomyelitis (dark gray) (a) in 1988, the year the World Health Assembly voted to eradicate the disease and at which time polio was present in more than 125 countries, and (b) at the end of 2003, when endemic polio was limited to 6 countries.

View larger version (30K): [in a new window]   FIGURE 2—— Reported polio cases in Africa (January 1, 2003, to July 31, 2004) and countries participating in synchronized outbreak response campaigns in late 2004.