Placebo

Titers for DEN 1, DEN 2, DEN 3 and DEN 4 neutralizing antibodies, expressed as Geometric Mean Titers (GMTs), with cut-off values greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum. Not primed = Not primed by MN50; Primed = Primed by MN50. Primed subject is a subject with neutralizing antibody titer ≥ 10 ED50 at pre-vaccination for at least one DEN type. Not primed subject is a subject with neutralizing antibody titer <10 ED50 for any DEN type at pre-vaccination.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 20 millimeters (mm) of injection site.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.

SAEs assessed include medical occurrences that result in death, are life-threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet).

The abnormal findings at Dengue physical examination included: Rash, Generalized Rash, Skin Hemorrhage, Conjunctival Hemorrhage, Conjunctival Injection, Mucosal Hemorrhage, Lymphadenopathy, Generalized Lymphadenopathy, Hepatomegaly and Splenomegaly. Rash involved < 50% of the body surface; Generalized rash involved at least 50% of the body surface. Generalized lymphadenopathy was defined as palpable lymph nodes in four or more of the following locations: cervical, axillary, inguinal or other, with right and left sides considered as separate locations.

The number of subjects with suspected and confirmed Dengue post-vaccination.

The number of subjects with measurable dengue viremia at specified timepoints. Negative = Genome equivalent (GEQ)/µL result is equal to zero; Undetermined = GEQ/µL result is below limit of detection (LOD); Positive = GEQ/µL result is ≥ LOD.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet). Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

Titers for DEN-1, DEN-2, DEN-3 and DEN-4 neutralizing antibodies, expressed as Geometric Mean Titers (GMTs), with cut-off values greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum.

Assay cut-off values were greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum.

The antibody titers and pre-vaccination status were determined by MN50 with a cut-off value equal to 1:10.

Sero-response defined as: For initially seronegative subjects (antibody titer < 10 ED50 for neutralizing antibodies to DEN 1, DEN 2, DEN 3, DEN 4 prior to vaccination), antibody titer ≥ 10 ED50 at post-vaccination; For initially seropositive subjects (antibody titer ≥ 10 ED50 for neutralizing antibodies to DEN 1, DEN 2, DEN 3, DEN 4 prior to vaccination), antibody titer at post-vaccination ≥ 4 fold the pre-vaccination antibody titer.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 20 millimeters (mm) of injection site.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as oral temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = oral fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.

SAEs assessed include medical occurrences that result in death, are life-threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet). Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter. Note: No blood sample was taken for these laboratory tests at Month 6 post-booster vaccination.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet).

The abnormal findings at Dengue physical examination included: Conjunctival hemorrhage, Conjunctival injection, Generalized lymphadenopathy, Generalized rash, Hepatomegaly, Lymphadenopathy, Mucosal hemorrhage, Rash, Skin hemorrhage and Splenomegaly. Rash involved < 50% of the body surface; Generalized rash involved at least 50% of the body surface. Generalized lymphadenopathy was defined as palpable lymph nodes in four or more of the following locations: cervical, axillary, inguinal or other, with right and left sides considered as separate locations. Note: Results only available during the 31-day follow-up period (Month 1) after the booster dose, instead of at each booster phase visit [pre-vaccination, study Visit 12 post-booster vaccination (Days 2, 5, 8 or 12), Visit 13 post-booster vaccination (Days 5, 8, 12 or 14) and at Months 1 and 6 post-booster vaccination].

The number of subjects with suspected and confirmed Dengue post-booster vaccination.

The number of subjects with measurable dengue viremia at specified timepoints.

Assay cut-off values were greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum. Not primed = Not primed by MN50; Primed = Primed by MN50. Primed subject is a subject with neutralizing antibody titer ≥ 10 ED50 at pre-vaccination for at least one DEN type. Not primed subject is a subject with neutralizing antibody titer <10 ED50 for any DEN type at pre-vaccination.

Healthy male or female subjects, between and including 18-45 years of age, who received two primary doses of Dengue vaccine Formulation 19, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6 and one booster dose approximately 5-12 months after the second dose.

Healthy male or female subjects, between and including 18-45 years of age, who received two doses of Placebo, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6.

Total of all reporting groups

Healthy male or female subjects, between and including 18-45 years of age, who received two primary doses of Dengue vaccine Formulation 17b, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6, and one booster dose approximately 5-12 months after the second dose.

Healthy male or female subjects, between and including 18-45 years of age, who received two primary doses of Dengue vaccine Formulation 19, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6 and one booster dose approximately 5-12 months after the second dose.

Healthy male or female subjects, between and including 18-45 years of age, who received two doses of Placebo, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

Titers for DEN-1, DEN-2, DEN-3 and DEN-4 neutralizing antibodies, expressed as Geometric Mean Titers (GMTs), with cut-off values greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum.

The analysis was performed on the Primary ATP cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

Titers for DEN-1, DEN-2, DEN-3 and DEN-4 neutralizing antibodies, expressed as Geometric Mean Titers (GMTs), with cut-off values greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum. Not primed = Not primed by MN50; Primed = Primed by MN50. Primed subject is a subject with neutralizing antibody titer ≥ 10 ED50 at pre-vaccination for at least one DEN type. Not primed subject is a subject with neutralizing antibody titer <10 ED50 for any DEN type at pre-vaccination.

The analysis was performed on the Booster ATP cohort for immunogenicity, which included all evaluable subjects who completed the primary vaccination course, who had received the booster dose according to their random assignment and for whom data concerning immunogenicity outcome measures were available.

Titers for DEN 1, DEN 2, DEN 3 and DEN 4 neutralizing antibodies, expressed as Geometric Mean Titers (GMTs), with cut-off values greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum. Not primed = Not primed by MN50; Primed = Primed by MN50. Primed subject is a subject with neutralizing antibody titer ≥ 10 ED50 at pre-vaccination for at least one DEN type. Not primed subject is a subject with neutralizing antibody titer <10 ED50 for any DEN type at pre-vaccination.

The analysis was performed on the Booster ATP cohort for immunogenicity, which included all evaluable subjects who completed the primary vaccination course, who had received the booster dose according to their random assignment and for whom data concerning immunogenicity outcome measures were available.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 20 millimeters (mm) of injection site.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) with the symptom sheet filled in and for whom data were available.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) with the symptom sheet filled in and for whom data were available.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 20 millimeters (mm) of injection site.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

SAEs assessed include medical occurrences that result in death, are life-threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

The analysis was performed on the Primary Total Vaccinated Cohort, included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet).

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

The abnormal findings at Dengue physical examination included: Rash, Generalized Rash, Skin Hemorrhage, Conjunctival Hemorrhage, Conjunctival Injection, Mucosal Hemorrhage, Lymphadenopathy, Generalized Lymphadenopathy, Hepatomegaly and Splenomegaly. Rash involved < 50% of the body surface; Generalized rash involved at least 50% of the body surface. Generalized lymphadenopathy was defined as palpable lymph nodes in four or more of the following locations: cervical, axillary, inguinal or other, with right and left sides considered as separate locations.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

The number of subjects with suspected and confirmed Dengue post-vaccination.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

The number of subjects with measurable dengue viremia at specified timepoints. Negative = Genome equivalent (GEQ)/µL result is equal to zero; Undetermined = GEQ/µL result is below limit of detection (LOD); Positive = GEQ/µL result is ≥ LOD.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet). Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter.

The analysis was performed on the Primary Total Vaccinated Cohort, which included all vaccinated subjects (with at least one vaccine administration documented) for whom data were available.

Titers for DEN-1, DEN-2, DEN-3 and DEN-4 neutralizing antibodies, expressed as Geometric Mean Titers (GMTs), with cut-off values greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum.

The analysis was performed on the Primary ATP cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

Assay cut-off values were greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum.

The analysis was performed on the Primary ATP cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

The antibody titers and pre-vaccination status were determined by MN50 with a cut-off value equal to 1:10.

The analysis was performed on the Primary ATP cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

Sero-response defined as: For initially seronegative subjects (antibody titer < 10 ED50 for neutralizing antibodies to DEN 1, DEN 2, DEN 3, DEN 4 prior to vaccination), antibody titer ≥ 10 ED50 at post-vaccination; For initially seropositive subjects (antibody titer ≥ 10 ED50 for neutralizing antibodies to DEN 1, DEN 2, DEN 3, DEN 4 prior to vaccination), antibody titer at post-vaccination ≥ 4 fold the pre-vaccination antibody titer.

The analysis was performed on the Primary ATP cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 20 millimeters (mm) of injection site.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) with the symptom sheet filled in and for whom data were available.

Assessed solicited general symptoms were abdominal pain, arthralgia, fatigue, fever [defined as oral temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, muscle aches, nausea, pain behind the eyes, photophobia, pruritus, rash and vomiting. Any = occurrence of the symptom regardless of intensity grade or relation to vaccination. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = oral fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the study vaccination.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) with the symptom sheet filled in and for whom data were available.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

SAEs assessed include medical occurrences that result in death, are life-threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet). Below = value below the laboratory reference range defined for the specified visit and laboratory parameter; Within = value within the laboratory reference range defined for the specified visit and laboratory parameter; Above = value above the laboratory reference range defined for the specified visit and laboratory parameter. Note: No blood sample was taken for these laboratory tests at Month 6 post-booster vaccination.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

Among assessed haematological and biochemical parameters were: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), hematocrit (HC), absolute neutrophil count (NEU) and platelet count (Platelet).

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

The abnormal findings at Dengue physical examination included: Conjunctival hemorrhage, Conjunctival injection, Generalized lymphadenopathy, Generalized rash, Hepatomegaly, Lymphadenopathy, Mucosal hemorrhage, Rash, Skin hemorrhage and Splenomegaly. Rash involved < 50% of the body surface; Generalized rash involved at least 50% of the body surface. Generalized lymphadenopathy was defined as palpable lymph nodes in four or more of the following locations: cervical, axillary, inguinal or other, with right and left sides considered as separate locations. Note: Results only available during the 31-day follow-up period (Month 1) after the booster dose, instead of at each booster phase visit [pre-vaccination, study Visit 12 post-booster vaccination (Days 2, 5, 8 or 12), Visit 13 post-booster vaccination (Days 5, 8, 12 or 14) and at Months 1 and 6 post-booster vaccination].

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

The number of subjects with suspected and confirmed Dengue post-booster vaccination.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

The number of subjects with measurable dengue viremia at specified timepoints.

The analysis was performed on the Booster Total Vaccinated Cohort, which included all vaccinated subjects (with documented booster dose administration) for whom data were available.

Assay cut-off values were greater than or equal to (≥) 10 estimated dose giving 50% (ED50) signal reduction when compared to a control without serum. Not primed = Not primed by MN50; Primed = Primed by MN50. Primed subject is a subject with neutralizing antibody titer ≥ 10 ED50 at pre-vaccination for at least one DEN type. Not primed subject is a subject with neutralizing antibody titer <10 ED50 for any DEN type at pre-vaccination.

The analysis was performed on the Booster ATP cohort for immunogenicity, which included all evaluable subjects who completed the primary vaccination course, who had received the booster dose according to their random assignment and for whom data concerning immunogenicity outcome measures were available.

Healthy male or female subjects, between and including 18-45 years of age, who received two primary doses of Dengue vaccine Formulation 17b, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6, and one booster dose approximately 5-12 months after the second dose.

Healthy male or female subjects, between and including 18-45 years of age, who received two primary doses of Dengue vaccine Formulation 19, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6 and one booster dose approximately 5-12 months after the second dose.

Healthy male or female subjects, between and including 18-45 years of age, who received two doses of Placebo, administered subcutaneously into the upper-outer triceps/deltoid area of the non-dominant arm, at Months 0 and 6.

Primary phase

Booster phase

Booster phase