Spearman's rank correlation ‘rs’ value is given; *p<0.05, ** p<0.01 and ***p<0.001, ‘–’ denotes inverse associations and ns = no significant correlation. Variables that are not shown displayed no co
F values from ANOVA for relationship between antibody and variables. Model accounts for variation in sex (male (M) or female (F)), age group (1∶5–10 years; 2: 11–15 years; 3: >16 years), and infection
