In Nigeria we have made remarkable progress in the fight against polio, with campaigns that drove polio down from 388 cases in 2009 to 21 in 2010—a 95-percent reduction. We are extremely hopeful that these gains will continue, and we know much hard work remains.

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Polio is a highly infectious disease caused by a virus. It invades the nervous system and can quickly cause paralysis. Thanks to global immunization campaigns, polio has been reduced by 99 percent globally, and eradication is within reach. We've even provided this handy and visually pleasing infographic to give you a better sense of how close we really are.

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In years past, if an 18-month-old girl was paralyzed by polio in India in the middle of January, it would have been barely noticed. Not in 2011.

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In 1988, I was assigned by the US Centers for Disease Control and Prevention (CDC) to help investigate an outbreak of polio, the first polio investigation of my career.

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I will never forget March 16, 1975. It had been almost four months since I began working in India’s largest state, Uttar Pradesh (UP), to try to eradicate smallpox. 

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