Fig. 1
From: Facility-based surveillance for influenza and respiratory syncytial virus in rural Zambia
Trends in (A) ILI, B influenza A virus, C influenza B virus, and D RSV prevalence among outpatients. ILI: influenza-like illness; OPD: outpatient department; RSV: respiratory syncytial virus. Black up pointing triangle: Partial month of surveillance. A OPD attendance and proportion of OPD patients with ILI at Macha Hospital. Gray and blue lines are LOWESS curves for number of patients screened and proportion with ILI, respectively. B–D Viral positivity over the study period for influenza A, influenza B, and RSV, respectively. Bar graph represents the number of positive tests among OPD study participants. Line represents estimated prevalence among all OPD patients with 95% confidence interval. Blue line represents estimated monthly ILI prevalence among all OPD patients (LOWESS)