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Volume 26, Number 10—October 2020
Dispatch

Effect of Nonpharmaceutical Interventions on Transmission of Severe Acute Respiratory Syndrome Coronavirus 2, South Korea, 2020

Sukhyun RyuComments to Author , Seikh Taslim Ali, Cheolsun Jang, Baekjin Kim, and Benjamin J. Cowling
Author affiliations: Konyang University College of Medicine, Daejeon, South Korea (S. Ryu, C. Jang, B. Kim); The University of Hong Kong, Hong Kong, China (S.T. Ali, B.J. Cowling)

Main Article

Table

Demographic characteristics of 2,023 persons with confirmed cases of coronavirus disease, from publicly available data, South Korea, outside of Daegu-Gyeongsangbuk provincial region on April 21, 2020*

Characteristic All, no. (%) Period 1, no. (%)† Period 2, no. (%)‡
Age group, y



0–19
123 (6)
11 (5)
112 (6)
20–39
715 (35)
104 (50)
611 (34)
40–59
619 (31)
50 (24)
569 (31)
60–79
295 (15)
37 (18)
258 (14)
>80y
50 (3)
6 (3)
44 (2)
Unknown
221 (11)
0
221(12)
Sex



M
820 (41)
107 (56)
713 (39)
F
953 (47)
100 (43)
853 (47)
Unknown
250 (12)
1 (1)
249 (14)
Type of transmission§



Local
892 (44)
116 (55)
776 (43)
Imported from Daegu-Gyeongsangbuk
155 (8)
65 (31)
90 (5)
Imported from abroad
552 (27)
16 (8)
536 (30)
Cases occurring in large clusters 424 (21) 11 (5) 413 (23)

*Assignment to period was based on date of symptom onset. If cases were asymptomatic or date of symptom onset date was not reported, we used the date of case confirmation.
†Jan 20–Feb 23, 2020; n = 208.
‡Feb 24–Apr 21, 2020; n = 1,815.
§Source of infection is provided for all cases; if not identified, we considered the case to have occurred by local transmission.

Main Article

Page created: June 02, 2020
Page updated: September 17, 2020
Page reviewed: September 17, 2020
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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