Table 3a.
Reduction in viral infectivity (Log10) and percentual activity (%) (TCID50/mL) to coronavirus MHV-3 inoculated PFF2 (model 3 M - 8801H) to different UV-C exposure times, as a function of the inoculation point, in comparison with inoculated masks not treated by UV-C.
| Virus inoculation site on 8801H model | Infectivity reduction TCID50/mL MHV-3 (Log10) (Mean ± S.D.) | Inactivation rate TCID50/mL MHV-3 (%) (Mean ± S.D.) |
|---|---|---|
| UV-C exposure time: 60 s | ||
| a - outer surface | 4.9375 ± 0.1083 | 99.99881 ± 0.0003 |
| b - outer surface | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| c - outer surface | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| d - outer surface | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| e - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| f - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| g - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| h - inner surface central | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| UV-C exposure time: 120 s | ||
| a - outer surface | 5.875 ± 0.1250 | 99.99986 ± 0.0000 |
| b - outer surface | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| c - outer surface | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| d - outer surface | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| e - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| f - elastic band | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| g - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| h - inner surface central | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| UV-C exposure time: 180 s | ||
| a - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| b - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| c - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| d - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| e - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| f - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| g - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| h - inner surface central | 5.9375 ± 0.1083 | 99.99988 ± 0.0000 |
| UV-C exposure time: 240 s | ||
| a - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| b - outer surface | 5.9375 ± 0.1083 | 99,99988 ± 0.0000 |
| c - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| d - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| e - outer surface | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| f - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| g - elastic band | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| h - inner surface central | 6 ± 0.0000 | 99.9999 ± 0.0000 |
| Virus inoculation site on 9920H model | Infectivity reduction TCID50/mL MHV-3 (Log10) (Mean ± S.D.) | Inactivation rate TCID50/mL MHV-3 (%) (Mean ± S.D.) |
| UV-C exposure time: none (control with virus without UV-C, 240 s) | ||
| a - outer surface | 2.9 ± 0.1083 | 99.875 ± 0.0433 |
| b - outer surface | 3 ± 0.0000 | 99.9 ± 0.0000 |
| c - outer surface | 2.9 ± 0.1083 | 99.875 ± 0.0433 |
| d - outer surface | 3 ± 0.0000 | 99.9 ± 0.0000 |
| e - outer surface | 3 ± 0.0000 | 99.9 ± 0.0000 |
| f - elastic band | 3 ± 0.0000 | 99.9 ± 0.0000 |
| g - elastic band | 3 ± 0.0000 | 99.9 ± 0.0000 |
| h - inner surface central | 2.9 ± 0.1083 | 99.875 ± 0.0433 |