Seasonal Influenza Rise: Strains, Surveillance and Vaccination
Why in the news
Seasonal influenza cases climbed in the Delhi-NCR region, dominated by Influenza A and B.
Key facts
- Influenza is a contagious viral respiratory disease, unlike the common cold in severity and cause.
- Symptoms: sudden cough, sore throat, high fever, body pain, headache, fatigue.
- India has two seasonal peaks: January-March, and August-October (late southwest monsoon).
Surveillance and preparedness
- Near real-time tracking of ILI (influenza-like illness) and SARI (severe acute respiratory infections), strengthened post COVID-19.
- A nationwide lab network supports it and helps match vaccines to circulating strains.
- High-risk groups: children, senior citizens, people with chronic respiratory conditions.
Vaccination
| Group | Status |
|---|---|
| Adults | Under-prioritised; depends on State governments for rollout and funding |
| Children | More widely accepted and supported |
Exam angle
- Strains: Influenza A and B.
- Surveillance terms: ILI, SARI.
- Peaks: January-March and August-October.