Related Clues:
- It may be prevented with a shot
- Swine __
- World Health Organization concern
- It goes around in winter
- H1N1 virus, e.g.
- W.H.O. concern
- Word after blue or bird
- Bug with its own season?
- H1N1 ailment
- Ladybug, for one
- Cold's kin
- Common viral infection
- Cause of chills and fever
- Seasonal illness
- Seasonal malady