Fig. 3
Antibody and T cell responses in BR groups of different recent exacerbation history. Antibody levels against bacterial antigens were measured by ELISA to give IgG titres (1/value) in BR groups with < 3 compared to > 3 exacerbations in the last 12 months against bacteria. T cell responses were measured by IFNγ ELIspot and expressed as spot-forming cells per 106 PBMC. (a, d) P.aeruginosa (b, e) M. catarrhalis (c, f) H.influenzae. Mean values + SEM are given. Mann-Whitney tests were performed