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A 2014 study in the American Journal of Infection Control found that a portable wand killed 100 percent of several types of bacteria commonly found on surfaces after just five seconds, and inactivated 90 percent of especially hardy spore-forming bacteria after 40 seconds. According to the researchers, a UVC device is a reasonable alternative to using chemicals to disinfect surfaces.
- UVA → typical sunlight waves, ranging from 315-400nm
- UVB → medium wavelength, ranging from 280-315nm, needed to promote vitamin D
- UVC → shortest wavelength, 100-280nm, very strong and effective
Studies show that more than 99.9% of seasonal harmful pathogens/bacteria present in airborne droplets are killed when exposed to a particular wavelength, held for at least a few seconds. This is great news for UVC, as its strong radiation is what kills the RNA protein shell present in viruses, outright destroying them, or at the very least, rendering them sterile.
Chemical disinfectants are recommended by the World Health Organization (WHO) to clean surfaces, notable floors. However, they come with residual effects and cannot be used to disinfect eatables, personal articles like a laptop, or watch, and so on. UVC allows you to disinfect all your personal, and close to heart, items while providing no residual effects.
Viruses are RNA wrapped in a protein. The protein allows it to interface with our cells and inject the RNA, the RNA is replicated by the cell. The RNA actually encodes the protein, which is also built by the cell in huge numbers, rewrapping the virus RNA in the process. Eventually the cell dies and all the new viruses inside come out to infect more cells.

If the UVC worked, it would either degrade the protein or damage the RNA. I think that a sunburn would be a large scale event of protein and the like degrading. Skin cancer would be the RNA damaging effect.

If the protein is degraded it can’t bond to the cells to inject the RNA. Without the protein the RNA has no way to get inside. If the RNA is degraded it cannot properly make new proteins. This means the virus is sterile.