Journal
JOURNAL OF INFECTIOUS DISEASES
Volume 223, Issue 2, Pages 197-205Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/infdis/jiaa618
Keywords
SARS-CoV-2; spike; RBD; COVID-19; neutralizing antibodies; antibody dynamics
Categories
Funding
- National Institute of Allergy and Infectious Diseases, National Institutes of Health [R01AI141707, F30AI149928]
- Bill & Melinda Gates Foundation [OPP1156262]
- Burroughs Wellcome Fund
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Antibody levels, including neutralizing antibodies, decline after SARS-CoV-2 infection, with a 4-fold average decrease in titers from 1 to 4 months after symptom onset. This decline is accompanied by a decrease in total antibodies capable of binding the viral spike protein. Further studies are needed to determine the long-term durability of immunity to SARS-CoV-2, including examination of long-lived B cells and antibody titers over extended periods.
Most individuals infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) develop neutralizing antibodies that target the viral spike protein. In this study, we quantified how levels of these antibodies change in the months after SARS-CoV-2 infection by examining longitudinal samples collected approximately 30-152 days after symptom onset from a prospective cohort of 32 recovered individuals with asymptomatic, mild, or moderate-severe disease. Neutralizing antibody titers declined an average of about 4-fold from 1 to 4 months after symptom onset. This decline in neutralizing antibody titers was accompanied by a decline in total antibodies capable of binding the viral spike protein or its receptor-binding domain. Importantly, our data are consistent with the expected early immune response to viral infection, where an initial peak in antibody levels is followed by a decline to a lower plateau. Additional studies of long-lived B cells and antibody titers over longer time frames are necessary to determine the durability of immunity to SARS-CoV-2.
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