Projets par an
Several studies reported on the humoral response in subjects having received the BNT162b2 mRNA COVID-19 vaccine. However, data on the kinetics of antibodies 3 months post-vaccination are currently lacking and are important to drive the future vaccination strategy. The CRO-VAX HCP study is an ongoing multicentre, prospective and interventional study designed to assess the antibody response in a population of healthcare professionals who had received two doses of the BNT162b2 mRNA COVID-19 vaccine. Two hundred individuals underwent a blood drawn within 2 days before the first vaccine dose. One-hundred and forty-two persons (71%) were categorized as seronegative at baseline while 58 (29%) were seropositive. Samples were then collected after 14, 28, 42, 56, and 90 days. Antibodies against the SARS-CoV-2 nucleocapsid and the receptor binding domain of the S1 subunit of the spike protein were measured in all individuals at different time points. Using a one-compartment kinetics model, the time to maximum concentration was estimated at 36 ± 3 days after the first dose and the estimated half-life of antibodies was 55 days (95% CI: 37–107 days) in seronegative participants. In seropositive participants, the time to maximum concentration was estimated at 24 ± 4 days and the estimated half-life was 80 days (95% CI: 46–303 days). The antibody response was higher in seropositive compared to seronegative participants. In both seropositive and seronegative subjects, a significant antibody decline was observed at 3 months compared to the peak response. Nevertheless, the humoral response remained robust in all participants.
|Pages (de - à)||1495-1498|
|Nombre de pages||4|
|journal||Emerging Microbes & Infections|
|Numéro de publication||1|
|Date de mise en ligne précoce||2021|
|Etat de la publication||Publié - 2021|
Empreinte digitaleExaminer les sujets de recherche de « Antibody titres decline 3-month post-vaccination with BNT162b2 ». Ensemble, ils forment une empreinte digitale unique.
- 1 Actif
The COVILAB project : Clinical laboratory investigations related to COVID-19
Douxfils, J., Dogne, J., FAVRESSE, J., Tre-Hardy, M., MULLIER, F., Haguet, H., Hardy, M., Melchionda, S., BOUVY, C., Morimont, L., Gillot, C., Djokoto, H., Alpan, L., Devel, P., Modaffari, E. & Maloteau, V.
13/03/20 → …