Assessed SAEs included medical occurrences that resulted in death, were life-threatening, required hospitalization or prolongation of hospitalization, resulted in disability/incapacity or were congenital anomalies/birth defects in the offspring of a study subject. Any SAE = occurrence of the SAE regardless of intensity grade. Grade 3 SAE = an SAE which prevented normal, everyday activities. Related SAE = an SAE assessed by the investigator as causally related to the study vaccination.

Medically significant conditions were defined as: AEs prompting emergency room or physician visits that were not (1) related to common diseases, or (2) not related to routine visits for physical examination or vaccination, or as SAEs that were not related to common diseases. Common diseases included: upper respiratory infections, sinusitis, pharyngitis, gastroenteritis, urinary tract infections, cervicovaginal yeast infections, menstrual cycle abnormalities and injury. Any MSC = occurrence of the MSC regardless of intensity grade. Grade 3 MSC = a MSC which prevented normal, everyday activities. Related MSC = MSC assessed by the investigator as related to the study vaccination.

pIMD(s) are a subset of medically significant conditions (MSCs) that included autoimmune diseases and other inflammatory and/or neurological disorders of interest which may or may not have had an autoimmune aetiology. Any pIMD = occurrence of the pIMD regardless of intensity grade. Grade 3 pIMD = a pIMD which prevented normal, everyday activities. Related pIMD = pIMD assessed by the investigator as related to the study vaccination.

Pregnancy is the term used to describe the period in which a fetus develops inside a woman's womb or uterus. In this study, the number of subjects with pregnancies was calculated. The subjects with confirmed pregnancies were followed up to determine the outcomes of the reported pregnancies.

A seroconverted subject was defined as a subject seronegative at baseline whose concentration for anti-HPV-16/18 antibodies, as measured by Enzyme-linked Immunosorbent assay (ELISA) , was higher than or equal to (≥) cut-off value. A seronegative subject was defined as a subject whose antibody concentration was below (\<) cut-off value. Cut-off values were 8 ELISA units per milliliter (EL.U/mL) for anti-HPV-16 antibodies and 7 EL.U/mL for anti-HPV-18 antibodies.

Serious adverse events (SAEs) assessed include medical occurrences that resulted in death, were life-threatening, required hospitalization or prolongation of hospitalization, resulted in disability/incapacity or were a congenital anomaly/birth defect in the offspring of a study subject. Any was defined as the occurrence of any SAE regardless of intensity grade or relation to vaccination. Grade 3 SAE = SAE which prevented normal, everyday activities (in adults/adolescents, such an SAE, for example, prevented attendance at work/school and necessitated the administration of corrective therapy). Related SAE = SAE assessed by the investigator as causally related to the study vaccination.

Medically significant conditions (MSCs) are defined as: AEs prompting emergency room or physician visits that were not related to common diseases, or not related to routine visits for physical examination or vaccination; SAEs that were not related to common diseases. Common diseases include: upper respiratory infections, sinusitis, pharyngitis, gastroenteritis, urinary tract infections, cervicovaginal yeast infections, menstrual cycle abnormalities and injury. Potential immune-mediated diseases (pIMDs) are a subset of medically significant conditions that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune aetiology. Any was defined as the occurrence of any MSC or pIMD regardless of intensity grade or relation to vaccination. Grade 3 MSC or pIMD = a MSC or pIMD which prevented normal, everyday activities. Related MSC or pIMD = a MSC or pIMD assessed by the investigator as related to the vaccination.

Live infant NO apparent congenital anomaly; Live infant congenital anomaly; Premature live infant NO apparent congenital anomaly; Premature live infant congenital anomaly; Elective termination NO apparent congenital anomaly; Elective termination congenital anomaly; Therapeutic abortion; Ectopic pregnancy; Spontaneous abortion NO apparent congenital anomaly; Spontaneous abortion congenital anomaly; Stillbirth NO apparent congenital anomaly; Stillbirth congenital anomaly; Molar pregnancy; Pregnancy ongoing; Lost to follow up.

SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity. Note: Results from one center where compliance issues were discovered are presented also separately.

MSCs include adverse events prompting emergency room or physician visits that are not related to common diseases or routine visits for physical examination or vaccination, or serious adverse events (SAEs) that are not related to common diseases. Common diseases include upper respiratory infections, sinusitis, pharyngitis, gastroenteritis, urinary tract infections, cervico-vaginal yeast infections, menstrual cycle abnormalities and injury.

The pregnancy outcomes reported included elective termination, live birth and spontaneous abortion, all of which occurred with no apparent congenital (congenit.) anomalies (anom.) Note: Results from one non-compliant center (NCC) are also presented separately.