Table 2. Summary of the direct contact routes simulated and the associated transmission rate modifier, duration of contact, and contact distance.

These are the values used in all simulations in the main text unless explicitly stated otherwise. Note that this table does not include fomite transmission routes, which are simulated and are described in detail S1.4 in S1 Text.

Contact-type	Description	Transmission modifier (ci)	Duration (τi)	Distance
Cohort	F2F contacts that occur within a team or cohort (see S1.5 in S1 Text for more information).	0.4 (either indoor or “loud-talking” outdoors, 25% of time)	Drivers: τcoh = 15min Pickers/Office: τcoh = 1h	1m
Random	F2F contacts that occur randomly in the workplace with weighted probability towards contacts between same job roles (see S1.5 in S1 Text for more information).	0.4 (25% of time talking)	τrand = 15 min	1m
Large-item handling	Time spent lifting and moving packages in pairs (see section S1.5 in S1 Text for more information).	0.08 (outdoor, 25% of time talking)	τhan = 5 min per delivery	1m
Pair delivery	Contact via sharing a cabin while delivering large-items (see S1.5 in S1 Text for more information).	0.4 (window closed) 0.08 (window open)	τcab = 10 min per delivery	1m
Pair dropoff	Contact between driver pairs during dropping large-item off at customer’s property (see S1.5 in S1 Text for more information).	0.4 (25% of time talking)	τdrop = 5 min per delivery	1m
Customer	Contact between driver(s) and customer during item delivery	SPDD: 0.08 (outside, talking 25% of time) LIDD: 0.24 (Inside 50% of time, talking 25% of time)	SPDD: 30s per delivery LIDD: 5min per delivery	1m
Room-share	Aerosol-mediated contact in poorly ventilated rooms	0.2 (no talking)	τoff = 6h τlun = 1h	∼ 6m (see S1.4 in S1 Text based on [27–29])
Car-share	Contact via carpooling to and from work.	0.4 (25% of time talking)	0.5h	1m
House-share	Contact via shared accommodation.	1	0.5h	1m (see S1.4 in S1 Text based on [21, 30–32]))