Table 3.
(A) Number and proportions of individuals per category based on adapted Shannon diversity index (ASDI) versus pre- and post-pandemic periods. (B) Number and proportion of H1.09-positive and -negative individuals per diversity category before (n = 3337) and after (n = 4247) pandemic onset, respectively.
*Category of ‘Broad responders’, defined as showing the highest antibody diversity across recent seasonal human influenza viruses (H1.99, H1.07, H3.03, H3.07), expressed by the Adapted Shannon diversity indices (ASDI).