Why Wear Face Masks?

Whether you love masks or hate them, this video is for you. Both sides of the debate need to understand the foundational reason behind why doctors, scientists, epidemiologists, etc., are asking us to wear masks.
Don't forget to watch the blooper real ...
Final credits at 8'16"
Blooper Reel at 8'36" (Joel doesn't understand the benefits of being 'upwind' - lol)