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Sera were collected one month after the second antigen dose (day 56), administered either with no adjuvant or formulated with QB-90, AE or Quil-A. Results are expressed as the mean value ± S.D. (n = 7). Different lowercase, uppercase and italic letters indicate significant difference among the treatment samples of total IgG, IgG1 and IgG2a, respectively, by a Tukey test (ρ≤0.01).
