Table 2. Relationship between geographic location, influenza seasonality, and proposed vaccination timing.
| City, State | Latitude | Peak Seasonality | Proportion of Influenza Positive (%) | Proposed Vaccination | |
|---|---|---|---|---|---|
| June-November | December-May | ||||
| Srinagar, Jammu and Kashmir | 34°0 | Dec-Feb | 13.3 | 86.7 | Sep-Oct |
| Delhi | 28°6 | Jul-Sep | 69.7 | 30.3 | Apr-May |
| Dibrugarh, Assam | 27°5 | Jun-Jul | 73.4 | 26.6 | Apr-May |
| Lucknow, Uttar Pradesh | 26°8 | Jul-Sep | 81.6 | 18.4 | Apr-May |
| Kolkata, West Bengal | 22°6 | Jun-Jul | 68.2 | 31.8 | Apr-May |
| Nagpur, Maharashtra | 21°2 | Jul-Aug | 73.3 | 26.7 | Apr-May |
| Pune, Maharashtra | 18°5 | Jul-Aug | 61.2 | 38.8 | Apr-May |
| Alappuzha, Kerala | 9°5 | May-Jul | 70.9 | 29.1 | Apr-May |
| Chennai, Tamil Nadu | 13°1 | Nov-Dec | 37.7 | 62.3 | Sep-Oct |
| Vellore, Tamil Nadu | 12°9 | Nov-Dec | 58.4 | 41.6 | Sep-Oct |