I don't know that this is the correct thread for discussing it, but it's false to say that taking off one's mask for short periods somehow results in a guaranteed case of catching covid. Viral load makes a difference - It matters whether the infectious person is masked, how long each person takes their masks off for, how far away they are seated, whether they are talking loudly, all kinds of things impact the viral load. I tried to mitigate this when travelling by leaving my mask on when nearby passengers were eating, and ate my food later after they replaced their masks. Is this perfect? No, but this is not a game of perfection, it's an attempt to minimise risk wherever possible. We can't let perfection be the enemy of good - risk is a continuum and every step to reduce risk helps.