After adjustment for the potential confounders, sex, age, and time since infection, we found in addition to CHRM5-Ab significant differences with higher levels of AABs against CHRM1 and F2R/PAR-1 while lower levels of ADRB1, CHRNA1, and EDNRA in PCS/ME/CFS than in PCS/non-ME/CFS groups (Figure 2A and Supplementary Table 3). Here, F2R is linked to infection.