Table 2. Description of household contacts of confirmed travel-acquired COVID-19 case patients (N = 15), United States, January–February 2020.

	N (%)	Any respiratory sample N (row %)	>1 respiratory sample N (row %)	Secondary cases detected N (row %)
Overall	15 (100.0)	15 (100.0)	15 (100.0)	2 (13.3)
Relationship
Significant Other	8 (53.3)	8 (100.0)	8 (100.0)	2 (25.0)
Other Household Member	7 (46.7)	7 (100.0)	7 (100.0)	0 (0.0)
Exposure to Travel-Acquired COVID-19 Patient Following Diagnosis*
Co-habiting with Case Patient During Case Isolation**	5 (35.7)	5 (100.0)	5 (100.0)	0 (0.0)
Isolated from Patient Following Diagnosis†	9 (64.3)	9 (100.0)	9 (100.0)	1 (11.1)
< 12 hours of exposure to the travel-associated case patient before isolation	2 (22.2)	2 (100.0)	2 (100.0)	0 (0.0)
1–3 days of exposure to the travel-associated case patient before isolation	5 (55.6)	5 (100.0)	5 (100.0)	0 (0.0)
> 3 days of exposure to the travel-associated case patient before isolation	2 (22.2)	2 (100.0)	2 (100.0)	1 (50.0)

*Does not include 1 household member who was concurrently diagnosed following co-isolation with their spouse, who was a suspected case.

**These persons inhabited the same house as the travel-related COVID-19 patient throughout the period of case isolation, but were instructed to have the case patient stay in a separate bedroom and use a separate bathroom if possible, and to have the case patient wear a face mask if they could not avoid being in the same room.

^†These persons maintained separate living quarters from the travel-associated case patient throughout the period of case isolation.