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As of November 2004, 10 countries are endemic for polio. Persistent transmission in Nigeria has led to the re-establishment of polio in 4 additional countries: Sudan, Chad, Burkina Faso, and Côtes d’Ivoire. In Asia, the number of cases has decreased, and may reach zero transmission by early 2005.

2004 — American Society of Tropical Medicine and Hygiene Meeting Highlights