This phase 1 clinical trial will evaluate the safety, reactogenicity, and immunogenicity of Boost-2867, given intramuscular (IM) with or without adjuvant or intranasal (IN) without adjuvant, as a booster dose to previously vaccinated healthy adults. Each of the study sites will be assigned to enroll either only participants who will receive IM administration (up to 5 sites) or only participants who will receive IN administration (up to 5 sites); no site will administer both IM and IN study product administrations. Within the IM and IN Arms the cohorts will be sequentially enrolled. The study is designed as a non-randomized, open-label, dose-escalation clinical trial evaluating one dose level of Boost-2867 without adjuvant administered IM, three dose levels of Boost-2867 with adjuvant administered IM, and three dose levels of Boost-2867 without adjuvant administered IN. A sample size of 140 participants (20 participants per dose cohort) is anticipated. To evaluate for early safety signals for this first-in-human trial, study product administration of participants enrolled for IM administration and those enrolled for IN administration will proceed in a staged fashion. For Cohorts 1 (IM administration without adjuvant) and 5 (IN administration), which may be enrolled and dosed concurrently, 3 sentinel participants under 50 years of age will be enrolled in each Cohort over at least 2 days. For each of those Cohorts independently, a safety review of halting rules and clinical safety data through at least Day 8 will be conducted by the Protocol Safety Review Team (PSRT) prior to enrollment of the remainder of the cohort. Enrollment, dosing, and safety oversight for IM Cohorts 2, 3, and 4 will proceed in the same fashion as Cohort 1, except that sentinel enrollment need not be spaced over at least 2 days. Similarly, for IN Cohorts 6 and 7, enrollment and safety oversight will proceed in the same fashion as Cohort 5, except that sentinel enrollment need not be spaced over at least 2 days. The primary objectives are: 1) To evaluate the safety and reactogenicity of a single IM injection of three different antigen dose levels (5, 15, and 50 microgram) of Boost-2867 with Alhydrogel (R) (alum) and CpG 7909 adjuvants, and a single injection of 50 microgram Boost-2867 without adjuvant, in previously vaccinated healthy adults. 2) To evaluate the safety and reactogenicity of a single IN administration of three different antigen dose levels (20, 50, and 125 microgram) of Boost-2867 without adjuvant in previously vaccinated healthy adults.
Age range
18 Years – 64 Years
Sex
ALL
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Occurrence of abnormal clinical safety laboratory adverse events.
Timeframe: Through day 8
Occurrence of adverse events of special interest (AESIs).
Timeframe: Through 6 months
Occurrence of medically attended adverse events (MAAEs).
Timeframe: Through 6 months
Occurrence of new onset chronic medical conditions (NOCMCs).
Timeframe: Through 6 months
Occurrence of potentially immune-mediated diseases (pIMDs)
Timeframe: Through 6 months
Occurrence of Serious adverse events (SAEs).
Timeframe: Through 6 months
Occurrence of solicited local adverse events (AEs).
Timeframe: Through 7 days
Occurrence of solicited systemic adverse events (AEs).
Timeframe: Through 7 days
Occurrence of unsolicited adverse events (AEs).
Timeframe: Through 28 days