Table 2.
Time to inhale one infectious dose when entering a room where one of the three infected individuals in this study has been staying (singing) long enough to reach steady-state concentration (~ 1 h in enhanced ventilation and ~ 3 h in the normal ventilation) of viruses in the air. Model input: room size = 4 × 4 × 3 m3, inhalation rate = 9 L/min.
| Room conditions | Virus half-life time (min) | Steady-state concentration (TCID50/L room air) with source: | Time to inhale one dosea (min) with source: | ||||
|---|---|---|---|---|---|---|---|
| Ind. 1 | Ind. 2 | Ind. 3 | Ind. 1 | Ind. 2 | Ind. 3 | ||
| Normal (ventilation = 0.5 ACH) | 10 | 1.9 | 0.5 | 0.06 | 1.2 | 4.3 | 38 |
| 30 | 4.5 | 1.3 | 0.14 | 0.5 | 1.9 | 17 | |
| Well-ventilated (ventilation = 3 ACH) | 10 | 1.3 | 0.4 | 0.04 | 1.8 | 6.4 | 57 |
| 30 | 2.0 | 0.6 | 0.06 | 1.1 | 4.0 | 36 | |
a1 dose = 10 TCID50.