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Vaccine-induced responses to heat labile toxin subunit B (LTB). Pooled sera collected on day 13 after the 1st boost (day 13 pb, (a,b)) and on day 14 after the 2nd boost (day 14 pb2, (c,d)) from mice that received low dose vaccines were screened for reactivity against LTB. (e). Pooled sera collected 2 weeks after boost with high dose PUVA vaccine ± dmLT. Rabbit anti-LTB served as a positive control. The mean OD450 ± sd from duplicate or triplicate ELISA values are shown.
