Parameter | Primary School Best-Estimate [Range] | Secondary School Best-Estimate [Range] | Reference |
---|---|---|---|
No. of enrolled students during outbreaks | 868 | 1873 | Literaturea |
No. of first generation infected cases | 28 | 69 | Literaturea |
No. of index case/s | 1 | 1 | Literaturea |
Infection period in school (day) | 3 | 4 | Literaturea |
Portion of unvaccinated students | 3.3% | 0.3% | Literaturea |
Portion of students with 1-dose vaccination | 96.7% | 70.9% | Literaturea |
Portion of students with 2-dose vaccination | 0.0% | 28.8% | Literaturea |
No. of students in infector’s classroom | 24 | 30 | Literaturea |
No. of students in recirculation area | 592 | 1843 | Literaturea |
No. of students in common area | 664 | 1873 | Literaturea |
Average time spent in classroom/s (min) | 280 [270–290]b | 340 | Literaturea |
Average time spent in recirculation area (min) | 280 [270–290]b | 340 | Literaturea |
Average time spent in common area (min) | 20 [10–30]b | 70 | Literaturea |
HVAC system runtime fraction | 1 | 0.768 | Literaturea |
Recirculated air fraction | 0.438 | 0.05 | Literaturea |
Supply airflow rate of one classroom (m3/min) | 28.3 | 8.5 | Literaturea |
Total HVAC system capacity (m3/min) | 1019.4 | 595 | Literaturea |
Air filter removal efficiency (%) | 12 | 12c [10.5–42.2] | Literatured |
Occupancy density of classroom (m2/person) | 4 [3–5] | 4 [3–5] | DOEe |
Volume of recirculation area (m3) | 13,832 [10374–17,290] | 33,600 [25200–42,000] | Estimatedf |
Occupancy density of common area (m2/person) | 1.39 [1.04–1.74] | 1.39 [1.04–1.74] | DOEe |
Inhalation rate (m3/day) | 12.96[11.34–14.53] | 15.53 [13.93–17.45] | EPAg |
Deposition rate of measles bio-aerosols (1/h) | 1.7 [1.0–2.7] | 1.7 [1.0–2.7] | Literatured |
Natural ventilation rate (1/h) | 0.31 [0.12–0.49] | 0.31 [0.12–0.49] | DOEh |