I'd wager that virus infectivity decay is strictly stochastic in both time and dosage, that there isn't any truly safe exposure greater than absolute zero or tr

I'd wager that virus infectivity decay is strictly stochastic in both time and dosage, that there isn't any truly safe exposure greater than absolute zero or truly safe time/distance when sharing air with infected. There are just thresholds of scientific perception where we say good enough. That would mean that yes, there is an infinitesimally small chance to get infected from a doorknob that hasn't been touched in three weeks, but those odds are so low that with eight billion people and two years of pandemic it's unlikely to ever have happened (and if it did we'd certainly not know about it). Living in quarantine, eventually getting driven to the airfield, plenty of infinitesimally unlikely exposure opportunities.