Anonymous ID: e0124f April 23, 2020, 3:35 p.m. No.8901386   🗄️.is 🔗kun   >>1428

another paper on 222 nm light:

http://www.columbia.edu/~djb3/papers/Germicidal%20Efficacy%20and%20Mammalian%20Skin%20Safety%20of%20222-nm%20UV%20Light.pdf