Study: NCT06382311

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 1
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 2
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 2
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 2
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Flu Pandemic mRNA_Dose level 2
Description: 2 doses of study intervention are administered to participants intramuscularly. If selected as dose level 1 or dose level 2 in Phase 2 Part B, 1 dose is administered to participants.