Importance of sample dilution in the evaluation of the antibody response after SARS-CoV-2 vaccination

  • Julien Favresse
    Corresponding author.
    University of Namur, Department of Pharmacy, Namur Research for Life Sciences, Namur Thrombosis and Hemostasis Center, Rue Saint-Luc, 8 – 5004, Bouge, Namur, Belgium

    Clinique Saint-Luc Bouge, Department of Laboratory Medicine, Bouge, Belgium
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  • Jonathan Douxfils
    University of Namur, Department of Pharmacy, Namur Research for Life Sciences, Namur Thrombosis and Hemostasis Center, Rue Saint-Luc, 8 – 5004, Bouge, Namur, Belgium

    QUALIblood s.a., Namur, Belgium
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      • All participants had high antibody titers after 3 months with the mRNA-BNT162b2 vaccine.
      • Nevertheless, a highly significative antibody decrease was observed at 3 months, only when a dilution factor was applied.
      • Non saturated quantitative signals are needed to study the real kinetics of antibodies.
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