KANO, KANO STATE, NIGERIA - NOVEMBER 13: Health workers and the local chief (L) pressure a woman to have her children vaccinated during the National Immunization Days (NIDs) November 13, 2002 in Kano, northern Nigeria. Nigeria is currently the greatest risk to polio eradication. In late 2003, immunization activities against polio were brought to a halt in the state of Kano, the last major polio reservoir in Africa, because of unfounded rumors, which suggested that the polio vaccine was not safe. Nigeria recorded 202 cases of polio in 2002, and 300 for the year 2003. Ninety percent of all cases are in the Muslim northern states, and among them, Kano has the worst record. (Photo by Jean-Marc Giboux/Getty Images)
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Getty Images News Jean-Marc Giboux