Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link

Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released.

Volume 26, Number 10—October 2020

Contact Tracing during Coronavirus Disease Outbreak, South Korea, 2020

Young Joon Park1, Young June Choe1, Ok Park, Shin Young Park, Young-Man Kim, Jieun Kim, Sanghui Kweon, Yeonhee Woo, Jin Gwack, Seong Sun Kim, Jin Lee, Junghee Hyun, Boyeong Ryu, Yoon Suk Jang, Hwami Kim, Seung Hwan Shin, Seonju Yi, Sangeun Lee, Hee Kyoung Kim, Hyeyoung Lee, Yeowon Jin, Eunmi Park, Seung Woo Choi, Miyoung Kim, Jeongsuk Song, Si Won Choi, Dongwook Kim, Byoung-Hak Jeon, Hyosoon Yoo, Eun Kyeong JeongComments to Author , on behalf of the COVID-19 National Emergency Response Center, Epidemiology and Case Management Team
Author affiliations: Korea Centers for Disease Control and Prevention, Cheongju, South Korea (Y.J. Park, O. Park, S.Y. Park, Y.-M. Kim, J. Kim, S. Kweon, Y. Woo, J. Gwack, S.S. Kim, J. Lee, J. Hyun, B. Ryu, Y.S. Jang, H. Kim, S.H. Shin, S. Yi, S. Lee, H.K. Kim, H. Lee, Y. Jin, E. Park, S.W. Choi, M. Kim, J. Song, S.W. Choi, D. Kim, B.-H. Jeon, H. Yoo, E.K. Jeong); Hallym University College of Medicine, Chuncheon, South Korea (Y.J. Choe)

Main Article

Table 1

Contacts traced by age group of index coronavirus disease patients, South Korea, January 20–March 27, 2020

Index patient age, y No. (%) index patients No. (%) contacts traced No. contacts traced/index patient Average time contacts monitored, d
0–9 29 (0.5) 237 (0.4) 8.2 12.5
10–19 124 (2.2) 457 (0.8) 3.7 9.0
20–29 1,695 (29.7) 15,810 (26.8) 9.3 9.8
30–39 668 (11.7) 8,636 (14.6) 12.9 11.1
40–49 807 (14.1) 9,709 (16.4) 12.0 11.0
50–59 1,107 (19.4) 11,353 (19.2) 10.3 9.6
60–69 736 (12.9) 8,490 (14.4) 11.5 8.2
70–79 338 (5.9) 2,389 (4.0) 7.1 8.5
202 (3.5)
1,992 (3.4)
Total 5,706 59,073 10.4 9.9

Main Article

1These authors contributed equally to this article.

Page created: June 30, 2020
Page updated: July 16, 2020
Page reviewed: July 16, 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.