Management and infection of close contacts
Because all the discharged patients were put under centralized
quarantine for 14 days at health care facilities, only 26 positive
retest patients had close contacts, and 148 close contacts were traced.Table 4 presents the characteristics of positive retest
patients and close contacts. The demographic characteristics of the 148
close contacts were as follows: sex distribution was more male (89,
60.1%) than female (59, 39.9%); all age groups were included, and 18
to 44 years old accounted for most of the close contact (92, 62.2%). A
total of 137 (92.6%) close contacts were quarantined at health care
facilities, and 11 (7.4%) close contacts quarantined at home. Among all
close contacts, 41.2% (61/148) were public transportation contacts,
28.4% (42/148) were household contacts, 21.0% (31/148) were
entertainment place contacts, 8.1% (12/148) were workplace contacts and
1.4% (2/148) were healthcare setting contacts. Positive retest patients
with moderate severity had the closest contacts (96, 64.9%), followed
by asymptomatic patients (40, 27.0%). After quarantine for 12.0 days
(IQR, 6.0 to 14.0 days) at a health care facility or at home and 4.5
times (IQR, 3.0 to 10.0 times) of RT-PCR testing, 148 close contacts
tested negative for SARS-CoV-2 RNA, and no suspicious clinical symptoms
were reported.