Table 5. Relative risk of exposure for farms that hire part-time workers (95% confidence interval)^*.

	2 day viral survival on a service vehicle
	Same integrator group as index farm		Different integrator group
Days of infectiousness at index farm	Day laborer scenario	Intermittent worker scenario	Day laborer scenario	Intermittent worker scenario
2 days	3.8 (3.0, 5.2)	1.7 (1.5, 2.0)	14.7 (11.4, 17.0)	4.2 (3.4, 4.7)
5 days	4.5 (2.8, 6.8)	1.3 (1.1, 1.4)	14.5 (11.1, 17.0)	2.0 (1.7, 2.2)
10 days	4.9 (3.5, 6.7)	1.1 (1.1, 1.1)	13.9 (10.4, 16.6)	1.3 (1.2, 1.3)
15 days	5.4 (3.9, 7.1)	1.0 (1.0, 1.0)	13.4 (9.8, 16.2)	1.0 (1.0, 1.1)

*Reference group is farms who do not hire part-time workers with the same model parameters (viral survival on a service vehicle, days of infectiousness, and integrator affiliation).