Table 2.
Retrospective calculation of the quanta emission rate (q) of SARS-CoV-2 based on some known airborne transmission cases.
| Case | Country | Number of infections, C | Total number of susceptible persons, S | Number of infector, I | Pulmonary ventilation rate, p (m3/h) | Exposure, t (h) | Ventilation rate, Q (m3/h) | Quanta emission rate, q (quanta/h) |
|---|---|---|---|---|---|---|---|---|
| Guangzhou restaurant (Lu et al., 2020) | China | 9 | 19 | 1 | 0.54 | 1.2 | 94 | 92 |
| Vietnam bar (Chau et al., 2020) | Vietnam | 12 | 200 | 1 | 0.54 | 4.5 | 6000 | 152 |
| Ningbo bus (Shen et al., 2020) | China | 20-23 | 60 | 1 | 0.54 | 1.67 | 234 | 90-107 |
| Dublin flight | Ireland | 13 | 49 | 1 | 0.5 | 7.5 | 7075 | 596 |
| Vietnam flight (Khanh et al., 2020) | Vietnam | 12 | 20 | 1 | 0.5 | 11 | 840 | 140 |
| Choir rehearsal (Hamner et al., 2020) | USA | 32 | 60 | 1 | 0.64 | 2.5 | 549 | 253 |
| Call center (11th floor) (Park et al., 2020) | Korea | 6-15 | 216 | 1 | 0.54 | 8 | 6480 | 42-107 |