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Updated: Oct 31, 2025
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Dynamic Monitoring of Seroconversion using a Multianalyte Immunobead Assay for Covid-19
Published on: February 16, 2022
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Predictors of Nonseroconversion after SARS-CoV-2 Infection
Emerging Infectious Diseases
|July 1, 2021
Summary
Not everyone infected with SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) develops antibodies. Lower viral loads in the nose correlate with a stronger antibody response in the body.
Area of Science:
- Immunology
- Virology
- Infectious Diseases
Background:
- Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection can lead to varying immune responses in individuals.
- The development of SARS-CoV-2-specific antibodies following infection is not universal.
Purpose of the Study:
- To investigate factors associated with the lack of antibody development (nonseroconversion) after SARS-CoV-2 infection.
- To identify correlates of the systemic antibody response to SARS-CoV-2.
Main Methods:
- Analysis of patient data including age and reverse transcription PCR (RT-PCR) cycle threshold values.
- Measurement of SARS-CoV-2 viral loads in nasopharyngeal samples.
- Correlation analysis between viral load, clinical factors, and antibody serostatus.
Main Results:
- Nonseroconversion was associated with younger age.
- Higher RT-PCR cycle threshold values, indicating lower initial viral load, were linked to nonseroconversion.
- Nasopharyngeal SARS-CoV-2 viral loads were identified as a significant correlate of the systemic antibody response.
Conclusions:
- Age and initial viral load influence the development of SARS-CoV-2 antibodies.
- Nasopharyngeal viral load is a key factor determining the systemic antibody immune response to SARS-CoV-2 infection.
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