Well, we are Americans here, and I think we could come up with some solutions.
As a medical professional, I wear lightweight disposable gowns and shoe covers over my clothing. Yes, I know that it is reverse protection, but it can still work for traveling on airlines.
In your workplace, wear protection over your clothes and shoes if you cannot launder them before a flight, and then just dispose of the outerwear.
Me, if I were flying now, I would traipse down to the discount store for a NEW cheap sweatsuit and tennies to wear during the flight and save myself a hassle. Fashion, i will forsake for safety.