Fig. 3

Results of routine serology tests at baseline (T0) and follow-up time points (T6 and T12). a Percentage of positive ELISA results; error bars represent 95% CI. b Change of ELISA serological index (SI) results over time in individual patients (the dashed line indicates the test positivity threshold SI ≥ 1.1). c ELISA serological index (SI) results (the dashed line indicates the test positivity threshold SI ≥ 1.1); box and whisker plots indicate median and IQR. d Percentage of positive ICT results; error bars represent 95% CI. Number of investigated patients with each test at each time point is indicated in Fig. 1