Table 1.

Summary of the returning travelers in quarantine with percent of positive SARS-CoV-2 test

Study Period	Days of Quarantine	Number of travelers	SARS-CoV-2 positive on arrivals	SARS-CoV-2 positive during the quarantine period	SARS-CoV-2 positive due to local transmission
May 15–June 30, 2020	14	10,784	335 (3.1%)	63 (0.6%)	276 (2.6%)
July 1–August 16, 2020	10	15,070	178 (1.2%)	28 (0.2%)	312 (2.1%)

With the 14 days quarantine, 2.6% were infected after the quarantine period and 0.6% within the quarantine period. With the 10-day quarantine, 2.1% were infected after the quarantine period and 0.2% within the quarantine period. There was no difference in these two quarantine strategies employed for the travelers