Figure 7. The variation of inactivation efficiency in RH range of 60% to 85% for (a) lift button and (b) handrail; Relation between inactivation efficiency (red line)/ bacteria colonies (blue line) and RH for (c) lift button and (d) handrail

From

Systematical Investigations on Disinfection Effectiveness of Far-UVC (222 nm) irradiation: From Laboratory Study to Field Tests

Ruijie Xie, Gabriel Y. K. Tse, Linda C.L. Man, Anthony L.H. Cheung, Dickson T. C. Wong, Edmond H. M. Lam, Haibao Huang, Dennis Y.C. Leung

Journal of Applied & Environmental Microbiology. 2022, 10(1), 17-34 doi:10.12691/jaem-10-1-3