Also: far-UVC, germicidal UV, UVB
UV light kills microbes and helps skin make vitamin D. Far-UVC at 222 nm kills germs while barely penetrating skin.
Only what the cited papers report.
Values as stated in the cited paper's abstract.
| Property | Value | Source |
|---|---|---|
| Far-UVC dose for 99.9% kill (HCoV-229E / OC43) | 1.7 / 1.2 mJ/cm² | Buonanno 2020 |
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Holick reviewed vitamin D deficiency, which remains common, and its role in skeletal and non-skeletal health.
As reported in: Holick (2007). Vitamin D Deficiency. New England Journal of Medicine. doi:10.1056/NEJMra070553
Abstract only
Welch and colleagues showed 2 mJ/cm² of 222 nm far-UVC inactivated over 95% of airborne H1N1 influenza virus; it cannot penetrate the outer dead layers of skin or eye.
Publisher update notice: correction
As reported in: Welch, Buonanno, Grilj et al. (2018). Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases. Scientific Reports. doi:10.1038/s41598-018-21058-w
Buonanno and colleagues found 1.7 and 1.2 mJ/cm² of 222 nm light inactivated 99.9% of airborne coronaviruses 229E and OC43.
Publisher update notice: correction
As reported in: Buonanno, Welch, Shuryak et al. (2020). Far-UVC light (222 nm) efficiently and safely inactivates airborne human coronaviruses. Scientific Reports. doi:10.1038/s41598-020-67211-2