You should not enter the room immediately after using UV lamps for sterilization, you should ventilate for 30 minutes before entering the room. UV sterilization mainly works on nucleic acids, which affect proteins and thus inactivate them, so both skin, bacteria or viruses and fungi are cleared. Because UV light can penetrate cells to make them die, so when using UV disinfection should be careful not to directly irradiate the human skin, especially the human eye, do not look directly at the lamp when the UV lamp is lit, otherwise it will trigger the conjunctiva and cornea inflammation. People are mistakenly injured by UV lamps, resulting in the same damage as sunburn, the lighter the redness, swelling, pain, skin and even peeling, the heavier the sun will appear keratosis.