Aerosols are ultra-small particles suspended in the air. Aerosols can be formed by sneezing, coughing or talking, or even by droplets during normal breathing, and can easily become infected and cause illness when inhaled. Aerosols are not always suspended in the air, but can settle easily and may attach to surfaces such as tables, chairs and floors. Many people worry about stepping on aerosols, but there is no need to worry too much about this. The vast majority of people are accustomed to outdoor and indoor shoes placed separately, go out to wear shoes can be placed in the door, and home to wear shoes can be placed indoors, almost do not step on the outdoor. Secondly, when you get home, put your shoes in a ventilated place, and after a period of time, even if you step on pollutants and viruses, there is no infectious activity. If you are really too worried, you can use 84 disinfectant, follow the instructions to add water to configure, made of disinfectant water, into a rag soaked, after returning home to the shoes on the rag more than a few times to step on the clean slippers, stepped on the disinfectant shoes aside, so that the disinfectant continues to play a role. Source: Dr. Yurai