Adjusted annual cumulative incidence^† per 10,000 persons by age, Vadu, District Pune, India, May 2009–April 2011.

†Incidences were adjusted for health utilization at non-study facilities using the following formula: adjusted hospitalization incidence = (unadjusted incidence)/(% of acute medical hospitalizations reported on health utilization survey that occurred at study facilities). *From 2009 and 2010 mid-year population estimates from Vadu HDSS. **Adjustment factor = proportion of acute medical hospitalizations reported on HUS that occurred at study facilities: 0.46 for persons aged <1 year, 0.50 for 1–4 years, 0.78 for 5–14 years, 0.73 for 15–29 years, 0.76 for 30–44 years, 0.68 for 45–59 years, 0.67 for >60 years. ***Defined as one or more respiratory symptoms in persons ≥5 years: cough, runny nose, sore throat, breathing difficulty or ear ache. Defined as one or more respiratory symptoms in persons <5 years: cough, runny nose, fast breathing, or ear ache.