Impact of SARS-CoV-2 infection on vaccine-induced immune responses over timeShow others and affiliations
2022 (English)In: Clinical & Translational Immunology (CTI), E-ISSN 2050-0068, Vol. 11, no 4, article id e1388Article in journal (Refereed) Published
Abstract [en]
Objective. To determine the long-term impact of prior SARS-CoV-2 infection on immune responses after COVID-19 vaccination. Methods. Using longitudinally collected blood samples from the COMMUNITY study, we determined binding (WHO BAU mL(-1)) and neutralising antibody titres against ten SARS-CoV-2 variants over 7 months following BNT162b2 in SARS-CoV-2-recovered (n = 118) and SARS-CoV-2-naive (n = 289) healthcare workers with confirmed prior SARS-CoV-2 infection. A smaller group with (n = 47) and without (n = 60) confirmed prior SARS-CoV-2 infection receiving ChAdOx1 nCoV-19 was followed for 3 months. SARS-CoV-2-specific memory T-cell responses were investigated in a subset of SARS-CoV-2-naive and SARS-CoV-2-recovered vaccinees. Results. Vaccination with both vaccine platforms resulted in substantially enhanced T-cell responses, anti-spike IgG responses and neutralising antibodies effective against ten SARS-CoV-2 variants in SARS-CoV-2-recovered participants as compared to SARS-CoV-2-naive participants. The enhanced immune responses sustained over 7 months following vaccination. Conclusion. These findings imply that prior SARS-CoV-2 infection should be taken into consideration when planning booster doses and design of current and future COVID-19 vaccine programmes.
Place, publisher, year, edition, pages
Wiley , 2022. Vol. 11, no 4, article id e1388
Keywords [en]
COVID-19, hybrid immunity, immune responses, SARS-CoV-2, vaccination
National Category
Immunology in the medical area
Identifiers
URN: urn:nbn:se:kth:diva-311505DOI: 10.1002/cti2.1388ISI: 000783284500001PubMedID: 35444806Scopus ID: 2-s2.0-85128764494OAI: oai:DiVA.org:kth-311505DiVA, id: diva2:1655843
Note
QC 20220504
2022-05-042022-05-042022-12-09Bibliographically approved