Table.

Scale factors applied to daily SARS-CoV-2 transmission probabilities in households, schools, workplaces, and the community under the scenarios of full-time and part-time rota reopening of schools

	Home contacts	School contacts	Work contacts	Community contacts
Full time
June 1, 2020	100%	23%*	40%	40%
June 15, 2020	100%	38%†	50%	50%
Sept 1, 2020	100%	90%‡	70%	90%
Part-time rota
June 1, 2020	100%	23%*	40%	40%
June 15, 2020	100%	38%†	50%	50%
Sept 1, 2020	100%	50%§	70%	70%
Jan 1, 2021	100%	90%‡	70%	90%

Each intervention is simulated by altering the daily transmission probability due to home, school, workplace, and community contact, with details presented in the appendix (pp 5–7). We assume that transmission within schools is proportional to school years going back, which allows parents to go back to work. We thus assume that return to workplaces is proportional to reopening of schools. Furthermore, we assume that 30% of the workforce will remain working from home for the foreseeable future. SARS-CoV-2=severe acute respiratory syndrome coronavirus 2.

^*Representing three of 13 school years returning to school.

^†Representing five of 13 school years returning to school.

^‡Representing all 13 years returning to school full time, with 10% subtracted to account for protective measures assumed to be in place.

^§All 13 years returning school, but on part-time rota, with half of school years present at one time.