This phase 2b study will evaluate safety, tolerability, and immunogenicity of an RSV vaccine when given together with Tdap in approximately 710 healthy nonpregnant women 18 through 49 years of age. This study will evaluate non-inferiority of RSV vaccine when given with Tdap and vice-versa.
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Percentage of Participants Achieving Anti-Tetanus Toxoid (TTd) Antibody Concentrations of Greater Than or Equal to (>=) 0.1 International Units Per Milliliter (IU/mL) at 1 Month After Vaccination
Timeframe: 1 month after vaccination
Percentage of Participants Achieving Anti-Diphtheria Toxoid (DTd) Antibody Concentrations of >= 0.1 IU/mL at 1 Month After Vaccination
Timeframe: 1 month after vaccination
Geometric Mean Concentration (GMC) and Geometric Mean Ratio (GMR) of Anti-Pertussis Antibodies 1 Month After Vaccination
Timeframe: 1 month after vaccination
Geometric Mean Titer (GMT) and Geometric Mean Ratio (GMR) of Respiratory Syncytial Virus Subgroup A (RSV A) Neutralizing Antibodies 1 Month After Vaccination Using 2.0 Fold Margin
Timeframe: 1 month after vaccination
Geometric Mean Titer (GMT) and Geometric Mean Ratio (GMR) of Respiratory Syncytial Virus Subgroup B (RSV B) Neutralizing Antibodies 1 Month After Vaccination Using 2.0 Fold Margin
Timeframe: 1 month after vaccination
Percentage of Participants With Prespecified Local Reactions Within 7 Days After Vaccination
Timeframe: Within 7 days after vaccination
Percentage of Participants With Prespecified Systemic Reactions Within 7 Days After Vaccination
Timeframe: Within 7 days after vaccination
Percentage of Participants With Adverse Events (AEs) Within 1 Month After Vaccination
Timeframe: Within 1 month after vaccination (up to 35 days)
Percentage of Participants With Medically Attended Adverse Events (MAE) and Serious Adverse Events (SAE)
Timeframe: Within 1 month after vaccination (up to 35 days)