Fig. 2From: Follow-up investigation of antibody titers and diagnostic antibody cutoff values in patients with scrub typhus in South KoreaOverview of prospective and retrospective follow-up antibody titers determined by the following tests: (i) IFA used by KCDC to detect IgM and IgG, (ii) IFA used by company A to detect total Ig, and (iii) antibody tests using two commercially available kits from companies C and DBack to article page