Postvaccination anti-S IgG levels predict anti-SARS-CoV-2 neutralising activity over 24 weeks in patients with RA.
Kristin SchmiedebergIrene A AbelaNatalia Barbara PikorNicolas VuilleumierMagdalena SchwarzmuellerSelina EppSabrina PaganoSarah GrabherrAngelica Brooke PattersonMadalina NussbergerAlexandra TrkolaBurkhard LudewigJohannes von KempisAndrea Rubbert-RothPublished in: RMD open (2022)
In patients with RA, vaccine-induced IgG antibody levels were diminished, while IgA and IgM responses persisted, indicating a delayed isotype switch. Anti-S IgG levels 2 weeks after the second vaccine dose correlate with the development of a potent neutralising activity after 12 and 24 weeks and may allow to identify patients who might benefit from additional vaccine doses or prophylactic regimen.