TABLE 1—

Follow-Up of Returning Travelers Over Time: San Bernardino County, CA

Date	Completed Monitoring Perioda	Low Riskb	Unable to Contactc	Still Trying to Contactd	Ongoing Monitoringe	Total
February 12, 2020	1	7	23	22	19	72
February 13, 2020	5	9	32	10	25	81
February 19, 2020	10	26	67	44	61	208
February 24, 2020	49	39	128	15	81	312
February 28, 2020	107	43	140	19	72	381
March 6, 2020	156	44	151	18	52	421
March 17, 2020	244	44	215	0	0	503

^aCompleted 14 days from last day of exposure without symptoms. The count is cumulative.

^bDenied ever having been to China or had only a short layover at a Chinese airport. The count is cumulative.

^cNo telephone number or incorrect number provided or no answer after 3 calls. The count is cumulative.

^dDid not answer but telephone number appears to be functional and less than 3 calls have been attempted.

^eContact established and remains within 14-d window for continued monitoring; converted to complete after 14 d.