Journal
FUTURE VIROLOGY
Volume 16, Issue 12, Pages 795-804Publisher
FUTURE MEDICINE LTD
DOI: 10.2217/fvl-2021-0141
Keywords
antibody; COVID-19; IgG; IgM; SARS-CoV-2
Categories
Funding
- Tianjin Haihe Hospital Science and Technology Fund [HHYY-202001]
- Science and Technology Planning Project of Tianjin Jinnan District [20200112]
- National Key R&D Program of China [2019YFC0119405]
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The study aimed to detect antibody levels 8 months after COVID-19 infection. Most patients had sufficient antibodies to protect them from another COVID-19 episode, especially those with a history of severe illness. Factors like disease severity, C-reactive protein level, and duration of RNA shedding were related to antibody levels after 8 months.
Lay abstract This study aimed to detect the levels of antibodies made by the body in response to COVID-19, 8 months after infection. We reviewed the characteristics of 54 patients with a history COVID-19 to find factors that may influence antibody levels. The results showed that 8 months after infection, almost all the patients had sufficient antibody levels to protect them from another episode of COVID-19 and that antibody levels were especially well maintained in those with a history of severe COVID-19. Aim: To determine SARS-CoV-2 specific IgM and IgG levels of patients with COVID-19 at 8 months after symptom onset and to explore the predictors of antibody levels. Materials & methods: The magnetic chemiluminescence method was used to measure the antibody levels. Clinical data were collected and analyzed retrospectively. Results: A total of 54 patients were enrolled in this study, of whom 59.3% were IgM positive and 96.4% were IgG positive. The multiple linear regression analysis revealed that the duration of RNA shedding, C-reactive protein level and disease severity were independent predictors of IgG levels. Conclusion: COVID-19 patients retained long-term viral-specific protective immunity. Disease severity, C-reactive protein level and duration of RNA shedding were related to antibody levels 8 months after symptom onset.
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