I admire your problem solving ideas, but engineering this to a point that is 1. effective at mutually/exclusively recycling two sets of air and 2. cost effectiv

I admire your problem solving ideas, but engineering this to a point that is 1. effective at mutually/exclusively recycling two sets of air and 2. cost effective is impossible. Pretty much the same things were said about seatbelts. Would be akin to putting twin turbochargers in a cheap car which already has extremely high engine compression. Why? Please quantify and back this up. Seems to me that such mods are not that extreme. Plenty of cars in the past were not built by default, but were rather modified to be taxicabs, such that there was a wall and window completely between the passengers and front compartment. I see no reason why making that airtight is cost prohibitive. Heck, I bet people would've said that making a car's HVAC system bioweapon-agent proof would be cost prohibitive. Tesla just went and did it, and is putting that system into cars designed to hit a lower price tier than they had previously. but only a very select customer base would pay for it, Same thing was said about seatbelts. I bet plenty of Uber drivers who couldn't work otherwise right now would sign up for some kind of lease deal. and would likely not see any benefits they don't already see from "free" things like disinfecting, social distance, etc. Well, for one thing, Uber would be able to operate a passenger "rideshare" business during a pandemic.