Scientific Research supports UVA at 415 nm can be effective in killing viruses and bacteria.

There is scientific research that supports the idea that UVA radiation at a wavelength of 415 nm can be effective in killing certain types of viruses and bacteria. One such study was conducted by researchers at Hiroshima University in Japan and published in the Journal of Photochemistry and Photobiology B: Biology in 2019.

UVA A EfficacyIn the study, the researchers exposed a strain of human coronavirus (HCoV-229E) and a strain of bacteria (Staphylococcus aureus) to UVA radiation at a wavelength of 415 nm for various lengths of time. They found that both the virus and the bacteria were significantly reduced in number after exposure to UVA radiation at this wavelength.

The researchers also found that UVA radiation at a wavelength of 415 nm was able to penetrate through a layer of mucus and effectively kill the virus and bacteria beneath the surface.

This study provides evidence that UVA radiation at a wavelength of 415 nm can be effective in killing certain types of viruses and bacteria, including human coronavirus and Staphylococcus aureus.