This study investigates the immunogenicity and safety of the 9vHPV vaccine in healthy Chinese females 9 to 45 years of age. The study consists of Stage I (Day 1 to Month 7) and Stage II (post Month 7 to Month 60). Stage II will report the long-term immunogenicity and safety in the 9-19 year-old age group only. The dual-primary hypotheses of Stage I are that 9vHPV vaccine induces non-inferior immune responses in females 9 to 19 years of age who are seronegative at Day 1 to the relevant HPV type compared to females 20 to 26 years of age who are seronegative at Day 1 to the relevant HPV type, as measured by anti-HPV 6, 11, 16, 18, 31, 33, 45, 52, and 58 GMTs at 1 month post Dose 3, and 9vHPV vaccine induces non-inferior immune responses in females 27 to 45 years of age who are seronegative at Day 1 to the relevant HPV type compared to females 20 to 26 years of age who are seronegative at Day 1 to the relevant HPV type, as measured by the seroconversion percentages to each of HPV types 6, 11, 16, 18, 31, 33, 45, 52, and 58 at 1 month post Dose 3. (Each vaccine component will be analyzed separately.)
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Stage I: Competitive Luminex Immunoassay (cLIA) Geometric Mean Titers (GMTs) for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age and 20 to 26 Years of Age: Month 7
Timeframe: 1 month post vaccination 3 (Month 7)
Stage I: Percentage of Participants 27 to 45 Years of Age and 20 to 26 Years of Age Who Are Seropositive by cLIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 7
Timeframe: 1 month post vaccination 3 (Month 7)
Stage II: cLIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 12
Timeframe: Month 12
Stage II: cLIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 24
Timeframe: Month 24
Stage II: cLIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 36
Timeframe: Month 36
Stage II: cLIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 48
Timeframe: Month 48
Stage II: cLIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 60
Timeframe: Month 60
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by cLIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 12
Timeframe: Month 12
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by cLIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 24
Timeframe: Month 24
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by cLIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 36
Timeframe: Month 36
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by cLIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 48
Timeframe: Month 48
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by cLIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 60
Timeframe: Month 60
Stage II: Immunoglobulin G Luminex Immunoassay (IgG LIA) GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 12
Timeframe: Month 12
Stage II: IgG LIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 24
Timeframe: Month 24
Stage II: IgG LIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 36
Timeframe: Month 36
Stage II: IgG LIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 48
Timeframe: Month 48
Stage II: IgG LIA GMTs for HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58 in Participants 9 to 19 Years of Age: Month 60
Timeframe: Month 60
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by IgG LIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 12
Timeframe: Month 12
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by IgG LIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 24
Timeframe: Month 24
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by IgG LIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 36
Timeframe: Month 36
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by IgG LIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 48
Timeframe: Month 48
Stage II: Percentage of Participants 9 to 19 Years of Age Who Are Seropositive by IgG LIA to HPV Types 6, 11, 16, 18, 31, 33, 45, 52, and 58: Month 60
Timeframe: Month 60