Related Clues:
- H1N1 virus, e.g.
- W.H.O. concern
- Word after blue or bird
- Bug with its own season?
- H1N1 ailment
- Cold's kin
- Cause of chills and fever
- Seasonal illness
- Seasonal malady
- In brief, winter illness
- Nasty viral disease, usually of winter
- A bad winter bug
- Influenza, in short
- Winter disease, awfully avian
- Winter virus disease, even birds get it