Rates of acute febrile illness (AFI) by age group from household and clinic surveillance in Asembo, western Kenya (Lwak Hospital) and Kibera, Nairobi (Tabitha Clinic), June 1, 2006 – May 31, 2008.

*Adjusted clinic rates were calculated by extrapolating from those with same syndrome defined at household visit who visited a clinic besides the designated referral clinics, Lwak and Tabitha (see methods). In Asembo, in the age categories Longitudinal prevalence is days of fever as part of an AFI per person-year. Incidence is number of episodes of AFI per person-year.