Fig. 2From: Using a community based survey of healthcare seeking behavior to estimate the actual magnitude of influenza among adults in Beijing during 2013-2014 seasonWeekly reported ILI counts by age, positive isolates and total positive rate of influenza virus during 2013–2014 season, Beijing, China* (*During 2013–2014 influenza season, a total of 20,476 pharyngeal swab specimens from the ILIs case-patients (within 3 days of symptom onset from patients who had not received antiviral drugs) were collected by designated staff. 2,334 isolates were positive, with an average positive rate of 11.4%.)Back to article page