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Incidence of bites by suspected rabid domestic dogs in Serengeti (SD, black line) and Ngorongoro (ND, grey line) districts derived from hospital records. Incidence is shown only for years before the implementation of domestic dog vaccination programmes in the study populations (July 1987–January 1997 in SD and January 1994–December 2003 in ND). No data were available for 6 months during 1993 in SD.
