The highest recovery rate was found in tick-borne encephalitis (TBE)-IgM, as antibody levels were reduced by −88% (95% CI: 80–96%, p = 0.071) at post-TPE and approached baseline values at follow-up1 (81%, 95% CI: 34–128%, p = 0.9422). The gene discussed is CD40LG; the disease is tick-borne encephalitis.