Fig. 2

(A and B). Stored plasma was used to perform ELISA using the Human Tetanus Toxoid Antibody IgG (TT-IgG) ELISA Kit. The number of cases versus controls used at each visit was V0 = 18/17, V1 = 15/11, V2 = 11/10, and V3 = 9/4, respectivelyFig. e 2 (C and D). plasma was then used to perform ELISA using the Corynebacterium diphtheriae toxin IgG ELISA kit. The number of cases versus controls at V0 = 20/14, V1 = 15/15, V2 = 13/7, and V3 = 8/4, respectivelyFig. e 2 (E and F). Plasma was used to perform ELISA using the Human Measles virus IgG antibody (MV-Ab-IgG) ELISA Kit. The number of cases versus controls used at V0 = 20/16, V1 = 18/12, V2 = 11/9, and V3 = 8/5, respectively. Statistical differences were determined using mixed effects analysis and Tukey’s multiple comparison tests. Statistical significance was determined at p < 0.05 and a 95% confidence level. * and **** imply a p-value less than 0.05 and 0.0001, respectively. ** indicate a p-value less than 0.01