Table 2.
Frequency distribution of influenza-like illness (ILI) and influenza cases by the influenza type and ILI activity from 2010 to 2015 in Iran
| Seasons | ILI | Type of positive ILI cases | ILI activity | |||||
|---|---|---|---|---|---|---|---|---|
| A type | B type | A and B | Sporadic | Local outbreak | No report | No activity | ||
| Spring | 6456 (12.06) | 225 (4.09) | 452 (20.67) | 677 (8.81) | 68 (33.83) | 9 (11.25) | 4 (14.29) | 0 |
| Summer | 2374 (4.44) | 40 (0.73) | 54 (2.47) | 94 (1.22) | 69 (34.32) | 0 (0.00) | 13 (46.42) | 3 (75) |
| Autumn | 16,763 (31.32) | 2480 (45.12) | 727 (33.24) | 3207 (41.74) | 43 (21.39) | 25 (31.25) | 6 (21.42) | 1 (25) |
| Winter | 27,933 (52.19) | 2752 (50.06) | 954 (43.62) | 3706 (48.23) | 21 (10.44) | 46 (57.50) | 5 (17.75) | 0 |
| Total | 53,526 (100) | 5497 (100) | 2187 (100) | 7684 (100) | 201 (100) | 80 (100) | 28 (100) | 4 (100) |
Data are presented as n (%).