Figure 4.
Escombe et al.'s results showing the proportion of TB ward-air exposed guinea pigs with evidence of TB infection or TB diseasea,b
aOne group was exposed when upper-room UVGI was turned on in the TB ward, and a control group was exposed when upper-room UVGI was turned off in the TB ward.
bAdapted from: Escombe AR, Moore DAJ, Gilman RH, Navincopa M, Ticona E, Mitchell B, et al. Upper-room ultraviolet light and negative air ionization to prevent tuberculosis transmission. PLoS Med 2009;6:e43.
TB = tuberculosis
UV = ultraviolet
UVGI = ultraviolet germicidal irradiation
