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Volume 27, Number 3—March 2021
Dispatch

Antibody Responses 8 Months after Asymptomatic or Mild SARS-CoV-2 Infection

Pyoeng Gyun Choe1, Kye-Hyung Kim1, Chang Kyung Kang, Hyeon Jeong Suh, EunKyo Kang, Sun Young Lee, Nam Joong Kim, Jongyoun YiComments to Author , Wan Beom ParkComments to Author , and Myoung-don Oh
Author affiliations: Seoul National University College of Medicine, Seoul, South Korea (P.G. Choe, C.K. Kang, H.J. Suh, E. Kang, S.Y. Lee, N.J. Kim, W.B. Park, M.-d. Oh); Pusan National University School of Medicine, Busan, South Korea (K.-H. Kim, J. Yi)

Main Article

Table 2

Positivity of antibodies to severe acute respiratory syndrome coronavirus 2 in 58 asymptomatic or mildly symptomatic patients at 8 mo after infection, South Korea*

Characteristic Anti-N pan-Ig ECLIA, no. (%)† Anti-N IgG ELISA, no. (%)‡ Anti-S IgG ELISA, no. (%)§ Anti-S1 IgG ELISA, no. (%)¶ sVNT, no. (%)#
Total
 53/58 (91.4)
 15/58 (25.9)
 50/58 (86.2)
 40/58 (69.0)
 31/58 (53.4)
Sex
M 21/23 (91.3) 1/23 (4.3) 17/23 (73.9) 11/23 (47.8) 7/23 (30.4)
F
 32/35 (91.4)
 14/35 (40.0)**
 33/35 (94.3)††
 29/35 (82.9)**
 24/35 (68.6)**
Age, y
<30 35/38 (92.1) 5/38 (13.2) 33/38 (86.8) 25/38 (65.8) 19/38 (50.0)
>30
18/20 (90.0)
 10/20 (50.0)**
 17/20 (85.0)
 15/20 (75.0)
 12/20 (60.0)
Duration of PCR positivity
<14 d 3/6 (50.0) 3/6 (50.0) 4/6 (66.7) 3/6 (50.0) 2/6 (33.3)
>14 d
 48/50 (96.0)**
 10/50 (20.0)
 44/50 (88.0)
 36/50 (72.0)
 27/50 (54.0)
Disease severity
Asymptomatic 7/7 (100) 0/7 (0) 5/7 (71.4) 4/7 (57.1) 4/7 (57.1)
Mildly symptomatic 46/51 (90.2) 15/51 (29.4) 45/51 (88.2) 36/51 (70.6) 27/51 (52.9)

*Anti-N, antinucleocapsid; anti-S, antispike; anti-S1, antispike subunit; ECLIA, electrochemiluminescence immunoassay; pan-Ig, panimmunoglobulin; sVNT, surrogate virus neutralization test.
†Roche Diagnostics (https://diagnostics.roche.com). 
‡Epitope Diagnostics (https://www.epitopediagnostics.com).
§InBios International (https://www.inbios.com).
¶Euroimmun (https://www.euroimmune.com).
#GenScript (https://www.genscript.com).
**p<0.01.
††p<0.05.

Main Article

1These first authors equally contributed to this article.

Page created: December 22, 2020
Page updated: February 21, 2021
Page reviewed: February 21, 2021
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