Gender distribution of respiratory viral infection in 924 patients with ILI. Of 924 patients with ILI, 540 (58.44%) were male and 384 (41.56%) female. Respiratory tract viruses were detected in 231 (46.80%) of the male patients and 181 (47.14%) of the female (P = 0.189, not significant). The age distribution is shown for each viral pathogen tested. Male = purple, female = blue.