I realize there are multiple ways, but if you tallied up all the people who caught the flu or a cold last year, what would be the majority...
Entrance for infection:
Bio surface that facilitates transmission:
- Mouth walls/palate/tongue
- Nose walls, cavity, sinuses
- Eye surface
- Throat walls
- Lung tissue
- Stomach/digestive tract surfaces
Again, I realize it's not just one entrance or surface that does the trick, I'm only wondering about the majorities.