Respiratory viruses attributable fraction and attributable fraction-adjusted prevalence
Among individuals of any age, the AF of the nine respiratory viruses investigated in this study ranged between 20.7%-90.8% among patients with ILI (Table 1) and 26.4%-91.9% among patients with SRI (Table 2). Influenza (90.8%), HMPV (77.5%) and RSV (74.8%) had the highest AF among patients with ILI (Table 1) and RSV (91.9%), HMPV (78.1%) and PIV type 3 (73.5%) had the highest AF among patients with SRI (Table 2).
Among patients of any age with ILI, rhinovirus (13.9%) had the highest AF-adjusted prevalence followed by influenza (11.9%) and RSV (3.8%) (Table 1). Among patients of any age with SRI, rhinovirus (10.5%) also had the highest AF-adjusted prevalence followed by RSV (9.1%) and influenza (3.4%) (Table 2). The AF-adjusted prevalence was used to estimate the virus-specific rates, which are provided in Figures 2-5.