Study: NCT04886154

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: MenABCWY-2Gen high dose vaccine
Description: MenABCWY-2Gen high dose vaccine is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the ABCWY high dose Group in study Phase I, ABCWY high dose_06 Group and ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding) and as 2 doses to participants in the ABCWY high dose_01 Group, ABCWY high doseS_02 Group and ABCWY high doseS_06 Group in study Phase II (Sourcing).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: MenABCWY-2Gen high dose vaccine
Description: MenABCWY-2Gen high dose vaccine is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the ABCWY high dose Group in study Phase I, ABCWY high dose_06 Group and ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding) and as 2 doses to participants in the ABCWY high dose_01 Group, ABCWY high doseS_02 Group and ABCWY high doseS_06 Group in study Phase II (Sourcing).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: MenABCWY-2Gen high dose vaccine
Description: MenABCWY-2Gen high dose vaccine is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the ABCWY high dose Group in study Phase I, ABCWY high dose_06 Group and ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding) and as 2 doses to participants in the ABCWY high dose_01 Group, ABCWY high doseS_02 Group and ABCWY high doseS_06 Group in study Phase II (Sourcing).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: MenABCWY-2Gen high dose vaccine
Description: MenABCWY-2Gen high dose vaccine is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the ABCWY high dose Group in study Phase I, ABCWY high dose_06 Group and ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding) and as 2 doses to participants in the ABCWY high dose_01 Group, ABCWY high doseS_02 Group and ABCWY high doseS_06 Group in study Phase II (Sourcing).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: Placebo
Description: Placebo is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the Placebo low dose Group, Placebo high dose Group in study Phase I and as 1 dose to participants in the ABCWY low dose_06 Group, ABCWY low dose_02 Group, ABCWY high dose_06 Group, ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: Placebo
Description: Placebo is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the Placebo low dose Group, Placebo high dose Group in study Phase I and as 1 dose to participants in the ABCWY low dose_06 Group, ABCWY low dose_02 Group, ABCWY high dose_06 Group, ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: Placebo
Description: Placebo is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the Placebo low dose Group, Placebo high dose Group in study Phase I and as 1 dose to participants in the ABCWY low dose_06 Group, ABCWY low dose_02 Group, ABCWY high dose_06 Group, ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding).

Intervention type: COMBINATION_PRODUCT
Group type: EXPERIMENTAL
Intervention: Placebo
Description: Placebo is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the Placebo low dose Group, Placebo high dose Group in study Phase I and as 1 dose to participants in the ABCWY low dose_06 Group, ABCWY low dose_02 Group, ABCWY high dose_06 Group, ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding).

Intervention type: COMBINATION_PRODUCT
Group type: PLACEBO_COMPARATOR
Intervention: Placebo
Description: Placebo is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the Placebo low dose Group, Placebo high dose Group in study Phase I and as 1 dose to participants in the ABCWY low dose_06 Group, ABCWY low dose_02 Group, ABCWY high dose_06 Group, ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding).

Intervention type: COMBINATION_PRODUCT
Group type: PLACEBO_COMPARATOR
Intervention: Placebo
Description: Placebo is administered intramuscularly in the deltoid region of the non-dominant arm as 2 doses to participants in the Placebo low dose Group, Placebo high dose Group in study Phase I and as 1 dose to participants in the ABCWY low dose_06 Group, ABCWY low dose_02 Group, ABCWY high dose_06 Group, ABCWY high dose_02 Group in study Phase II (Formulation and Schedule-finding).

Intervention type: COMBINATION_PRODUCT
Group type: ACTIVE_COMPARATOR
Intervention: MenB vaccine
Description: MenB vaccine is administered intramuscularly in the deltoid region of the non-dominant arm, whenever it's possible, as 2 doses in a 0,6-months schedule to participants in the Control Group in study Phase II (Formulation and Schedule-finding).

Intervention type: BIOLOGICAL
Group type: ACTIVE_COMPARATOR
Intervention: MenACWY vaccine
Description: MenACWY vaccine is administered intramuscularly in the deltoid region of the dominant arm as 1 dose to participants in the Control Group in study Phase II (Formulation and Schedule-finding).