This trial will be a randomized, placebo controlled, double-blind (within dosing group), dose escalation phase 1 trial, evaluating dosages of 1 mcg and 4 mcg of HydroVax-001 WNV vaccine given intramuscularly on Day 1 and Day 29 in up to 50 healthy adults \> /=18 and \< 50 years of age. The primary objective is to assess the safety, reactogenicity, and tolerability of the HydroVax-001 WNV vaccine administered intramuscularly in a two-dose series on Days 1 and 29 at a dose of 1 mcg or a dose of 4 mcg.
This trial will be a randomized, placebo controlled, double-blind (within dosing group), dose escalation phase 1 trial, evaluating dosages of 1 mcg and 4 mcg of HydroVax-001 WNV vaccine given intramuscularly on Day 1 and Day 29 in up to 50 healthy adults \> /=18 and \< 50 years of age at a single site. The study will consist of two dosing groups of HydroVax-001 vaccine to be enrolled sequentially. Each dose group will consist of 20 individuals who receive HydroVax-001 and 5 who receive placebo. Controls will receive sterile 0.9 percent NaCl placebo intramuscularly at days 1 and 29. The study duration is approximately 25 months (12 month enrollment, 13 month follow up) and subject participation duration of approximately 14 months. The primary objective is to assess the safety, reactogenicity, and tolerability of the HydroVax-001 WNV vaccine administered intramuscularly in a two-dose series on Days 1 and 29 at a dose of 1 mcg or a dose of 4 mcg. The secondary objective is to assess WNV-specific plaque reduction neutralization test (PRNT50) responses after a first dose and after a second dose of HydroVax-001 WNV vaccine given at doses of 1 mcg and 4 mcg. This study aims to recruit up to 50 men and women between the ages of 18 and 50. The study duration is approximately 25 months at a single site and subject participation duration is approximately 14 months.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Enrollment
HydroVax-001 West Nile Virus inactivated vaccine, alum-adsorbed given at doses of 1 mcg (low dose) and 4 mcg (high dose) IM on days 1 and 29
0.9% Sodium Chloride Injection diluent will be given IM on days 1 and 29
Duke Human Vaccine Institute - Duke Clinical Vaccine Unit
Durham, North Carolina, United States
Occurrence of any AE related to the study vaccine through day 57 after the second vaccination
Time frame: Day 1 post first vaccination to Day 57 post second vaccination
Occurrence of Grade 3 laboratory toxicities related to the study vaccine from first vaccination through day 15 after the second vaccination
Time frame: Day 1 post first vaccination to Day 15 post second vaccination
Occurrence of Grade 3 unsolicited adverse events related to the study vaccine from first vaccination through day 57 after the second vaccination
Time frame: Day 1 post first vaccination to Day 57 post second vaccination
Occurrence of SAEs related to the study vaccine at any time during the study
Time frame: Day 1 post first vaccination to Day 365 post second vaccination
Occurrence of solicited local AE and reactogenicity signs and symptoms in the 14 days after each vaccination
Time frame: Day 1 post first vaccination to Day 14 post first and second vaccination
Occurrence of solicited systemic AE and reactogenicity signs and symptoms in the 14 days after each vaccination
Time frame: Day 1 post first vaccination to Day 14 post first and second vaccination
Geometric mean PRNT50 titer at days 15 and 29 after first vaccination and at days 15, 29, 57, 180, and 365 following second vaccination
Time frame: Days 15 and 29 post first vaccination and Days 15, 29, 57, 180, and 365 post second vaccination
Percentage of subjects achieving seroconversion in PRNT50 titer (fourfold or greater increase in titer from baseline) at day 29 after first vaccination and at day 57 after second vaccination
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Time frame: Day 29 post first vaccination and Day 57 post second vaccination
The reverse cumulative distribution curve of PRNT50 titer on Days 15 and 29 after first vaccination and at days 15, 29, 57, 180, and 365 after the second vaccination for each dose group and for all dose groups combined
Time frame: Days 15 and 29 post first vaccination and Days 15, 29, 57, 180, and 365 post second vaccination