Fig. 2
From: Serological response to vaccination in post-acute sequelae of COVID
Pre- and post-vaccination IgM-S antibody levels in PASC. In both never-infected and COVID-recovered individuals, IgM-S antibody levels were expectedly increased in the immediate post-vaccination period and then significantly decreased after 8 weeks (P ≤ 0.002 for within group comparisons between the time periods before and after 8 weeks). However, in the setting of PASC, IgM-S antibody levels were not significantly lower after compared to before 8 weeks from vaccination (P = 0.33). This finding was consistent with IgM-S levels being higher in COVID-recovered than PASC-affected individuals within 8 weeks after vaccination (P = 0.001) and then not significantly different between these groups beyond 8 weeks after vaccination (P = 0.12)