“If vaccines shore up security from the inside [of a bank that’s being robbed], face coverings (which, you know, literally cover your face) erect a sturdy blockade around the bank’s exterior—fences, bars, better locks, and ID checks at an intruder’s typical point of entry,” writes theatlantic’s Katherine J. Wu. “Masks are physical barriers; they’re ‘great at preventing exposure to large doses of virus’ before the invaders even enter the premises,” Professor Akiko Iwasaki told her.  Swipe for another illustration by virology.down.under of why layering protection helps #StopTheSpread ➡️🧀 and read the full Atlantic article through our link in bio. Image descriptions in comments.