CD40LG and vibrio infectious disease: We assessed immunoreactivities of different native V. cholerae O139–OSP-core conjugates (conjugates 1a to 3a [Table 1]), analyzing IgM, IgA, and IgG isotype responses in humans recovering from cholera caused by V. cholerae O139 in Bangladesh (conjugates 1a, 2a, and 3a [Fig. 1]).