Figure 3.

Geometric mean antibody titers (GMTs) to respiratory syncytial virus subgroup A (RSV[A]) small hydrophobic protein ectodomain (SHe), by vaccine study group, on days 0–236 among all participants and to day 421 among step 2 participants. Error bars depict 95% confidence intervals. In step 1, SHe-containing vaccines had 10 µg of SHe antigen. In step 2 SHe-containing vaccines had 25 µg of SHe antigen. Two dose levels (10 or 25 µg) of the SHe antigen with each formulation were compared to placebo. A booster dose was administered on day 56. See “Methods” for a description of vaccine formulations. DPX, DepoVax.