Characteristics of enrolled influenza-like illness (ILI) cases, by medical setting and influenza virus status, n (%).

Note:aMunicipal district refers to seven central urban districts and suburban county refers to five county-level districts in Suzhou;bUnderlying medical conditions include asthma, chronic pulmonary disease, congenital heart disease, neuromuscular disease, renal dysfunction, blood disorders, immunosuppression, etc;cChi-square PdChi-square P