Yes, Philip Ternaud of new york University pointed out that if the toilet lid is opened when flushing, the instantaneous cyclone in the toilet can bring bacteria or microorganisms into the air up to 6 meters, suspend them in the air for several hours, and then land on walls and objects. In most families, going to the toilet, washing and showering are all carried out in the bathroom. Toothbrush, mouthwash cup, towel and toilet are in the same room, so it is naturally easy to be contaminated by bacteria. Therefore, it is necessary to develop the habit of covering the toilet lid when flushing.