Can ultraviolet light kill the coronavirus?

1. Many friends who have bought UV lamps will worry about a question: Can UV lamps kill the coronavirus? In fact, according to the newly released "Quick Guide for Diagnosis and Treatment of Novel Coronavirus Pneumonia", 75% alcohol, ether, chloroform, formaldehyde, chlorine-containing disinfectants, peracetic acid and ultraviolet light can all inactivate the virus. Therefore, medical ultraviolet lamps are effective in killing viruses.

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2. There are three types of ultraviolet rays in sunlight. Among them, ultraviolet rays with a wavelength of 100-275 nm can destroy the DNA of microorganisms (bacteria, viruses, fungi, chlamydia, etc.) and have a sterilization effect. Medical ultraviolet lamps, also known as ultraviolet germicidal lamps (UV lamps), are actually a low-pressure mercury lamp with two main emission lines, 254 nm and 185 nm. 254 nm ultraviolet rays kill bacteria by irradiating the DNA of microorganisms. 185 nm ultraviolet rays can turn O2 in the air into O3 (ozone). Ozone itself has a bactericidal effect, so it can be used for sterilization.

3. It should be noted that there is a difference in efficacy between medical and household ultraviolet lamps. The effective disinfection of the room area of ​​household ultraviolet lamps needs to be determined according to the specific instructions.