Let's say I have covid (but I am asymptomatic), I get on a plane, I am wearing a mask, I want to eat and drink, I remove the mask to eat and drink and that takes me 15-20 mins, but I keep removing it to drink periodically, I am alongside someone else eating at the same time, sometimes drinking at the same time as me, how much does the mask help in that situation? It's all for show by Delta/any airline. Planes, trains, ships, all incubators. If I was worried about catching the sniffles, I would not fly, mask or no mask.