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Volume 28, Number 11—November 2022
Research

Effectiveness of Second mRNA COVID-19 Booster Vaccine in Immunocompromised Persons and Long-Term Care Facility Residents

Yoo-Yeon Kim1, Young June Choe1, Jia Kim, Ryu Kyung Kim, Eun Jung Jang, Seon Kyeong Park, Do-Sang Lim, Seonju Yi, Sangwon Lee, Geun-Yong Kwon, Jee Yeon Shin, Sang-Yoon Choi, Mi Jin Jeong, and Young-Joon ParkComments to Author 
Author affiliations: Korea Disease Control and Prevention Agency, Cheongju, South Korea (Y.-Y. Kim, J. Kim, R.K. Kim, E.J. Jang, S.K. Park, D.-S. Lim, S. Yi, S. Lee, G.-Y. Kwon, J.Y. Shin, S.-Y. Choi, M.J. Jeong, Y.-J. Park); Korea University Anam Hospital, Seoul, South Korea (Y.J. Choe)

Main Article

Table 1

Characteristics among immunocompromised persons and LTCF residents in COVID-19 vaccine effectiveness study, South Korea, February–May 2022

Characteristics
 1st booster
2nd booster
No. (%) participants
 Person-days
 No. (%) participants
Person-days
Total
 736,439
 39,175,439
236,010
 5,197,160
Sex
F 294,572 (40.0) 16,096,170 94,864 (40.2) 2,129,509
M
 441,867 (60.0)
 23,079,269
141,146 (59.8)
 3,067,651
Age group, y
18–39 33,010 (4.5) 1,609,745 8,811 (3.7) 196,656
40–59 171,954 (23.3) 8,916,315 57,425 (24.3) 1,233,939
60–74 332,987 (45.2) 17,958,470 96,829 (41.0) 2,165,276
>75
 198,488 (27.0)
 10,690,910
72,945 (30.9)
 1,601,290
Location
Metropolitan area 344,722 (46.8) 18,053,072 95,738 (40.6) 2,084,863
Nonmetropolitan area
 391,717 (53.2)
 21,122,367
140,272 (59.4)
 3,112,297
Risk factors
Immunocompromised 477,215 (64.8) 25,564,786 97,478 (41.3) 2,132,538
Long-term care facility residents 259,224 (35.2)
 13,610,653 138,532 (58.7)
 3,064,622

Main Article

1These authors contributed equally to this article.

Page created: September 16, 2022
Page updated: October 21, 2022
Page reviewed: October 21, 2022
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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