Every act of flushing, so ordinary and reflexive, turns out to be a small atmospheric event — one that lifts invisible biological passengers into the air we breathe. A systematic review of 22 studies, led by researchers at Flinders University in Australia, has confirmed that toilet plumes carry live bacteria and viruses to adult breathing height, where they can linger for up to 20 seconds. The finding is not entirely new, but its implications — especially in hospitals, where the vulnerable and the pathogenic so often share close quarters — remind us that even the most mundane rituals of modern