> “It doesnt reduce how far the air is propelled it just redirects it. It does nothing to cut down the spread of disease.” <
By redirecting (deflecting) it, there must be a decrease in how far it’s propelled.
You don’t u defeat d fluid dynamics well do you. fluid (or air) traveling through a smaller space speeds up. It likely increases the distance. the point is the virus and drillers are it stopped by the mask they are sprayed into the environment.