Cohort1: Younger Adult Participants_ARCT-021_Placebo_ARCT-021/Placebo
|
Administration route |
None |
Dosage |
ARCT-021, one dose, on Day 0, Placebo (saline), one dose, on Day 28; on Day 208 either one dose of ARCT-021 or one dose of placebo |
Age |
Adult, Older_Adult |
|
Cohort2: Younger Adult Participants_ARCT-021_ARCT-021_ARCT-021/Placebo
|
Administration route |
None |
Dosage |
ARCT-021, one dose, on Day 0, second dose on Day 28, on Day 208 either one dose of ARCT-021 or one dose of placebo |
Age |
Adult, Older_Adult |
|
Cohort3: Younger Adult Participants_Placebo_Placebo_Placebo
|
Administration route |
None |
Dosage |
Placebo (Saline), one dose on Day 0, one dose on Day 28, and one dose on Day 208 |
Age |
Adult, Older_Adult |
|
Cohort4: Older Adult Participants_ARCT-021_Placebo_ARCT-021/Placebo
|
Administration route |
None |
Dosage |
ARCT-021, one dose, on Day 0, Placebo (saline), one dose, on Day 28; on Day 208 either one dose of ARCT-021 or one dose of placebo |
Age |
Adult, Older_Adult |
|
Cohort5: Older Adult Participants_ARCT-021_ARCT-021_ARCT-021/Placebo
|
Administration route |
None |
Dosage |
ARCT-021, one dose, on Day 0, second dose on Day 28, on Day 208 either one dose of ARCT-021 or one dose of placebo |
Age |
Adult, Older_Adult |
|
Cohort6: Older Adult Participants_Placebo_Placebo_Placebo
|
Administration route |
None |
Dosage |
Placebo (Saline), one dose on Day 0, one dose on Day 28, and one dose on Day 208 |
Age |
Adult, Older_Adult |
|