Table 1. Exposure criteria used to determine first concentric circle of contacts for case-patients 1–3 of Hennepin County tuberculosis case cluster, Minneapolis, Minnesota, USA, 2017 .

Case-patient no.	No. nights case-patient in shelter	Exposure criterion, no. nights
1	47	>10
2	28	>20
3	72	>10
1 and 3		>10