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Weekly incidence rates of reported meningitis in the Bobo-Dioulasso region from January through June of 1997, 2002, and 2003. V1, February 3–15 (n = 488); V2, February 25–March 15 (n = 480); V3, March 25–April 12 (n = 465); V4, April 22–May 10 (n = 463); V5, May 27–June 7 (n = 470).
