Related Clues:
- School attendance drop-off cause
- Cause of chills, perhaps
- Wintertime vaccine target
- Virus that can be passed through kissing!!! Watch out
- Concern of a global WHO program
- Bug that's not hard to catch
- Common cause for sick days
- Word before shot or season
- Source of unwelcome strains
- Like pizza for breakfast, typically
- Unsympathetic
- Far from warm
- Annual vaccine target
- It may include the sniffles
- It might give you the chills