OCU500 Vaccine for COVID-19 in Previously Vaccinated Adults

This study is testing a new COVID-19 vaccine called OCU500 in adults who have already been vaccinated. OCU500 is designed to target the Omicron XBB1.5 strain of the virus. Researchers want to see how safe OCU500 is and how well your body's immune system responds to it. The vaccine will be given either through the nose (intranasal) or by inhaling it. You might be able to join if you are between 18 and 64 years old, have completed your initial COVID-19 vaccine series, and received at least one booster shot. The study will look at any side effects and how your immune system reacts to the vaccine over 6 months. This trial is currently recruiting 80 participants.

Study design
This is a Phase 1, randomized, open-label, dose-escalation study involving 80 participants across four groups.
What's involved
You would need to provide written informed consent and be available for all study visits. The study measures safety through Day 8 and up to 6 months after receiving the study product.
Compensation
Not stated in the trial record.
Follow-up
Participants will be followed for adverse events for up to 6 months after receiving the study product.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07536308

A Safety and Immunogenicity Trial of OCU500, ChAd36 Vector Encoding SARS-CoV-2 Spike Vaccine Via Intranasal and Inhalational Routes in Previously Vaccinated Adults

Recruiting
PHASE1Ages 18–64InterventionalPrevention
National Institute of Allergy and Infectious Diseases (NIAID)
~80 participants
Updated 2026-08-28 on ClinicalTrials.gov
What's tested:OCU500

At a glance

Recruiting sites
5 of 6 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Occurrence of abnormal clinical safety laboratory adverse events (AE).
Measured over Through Day 8
+7 more outcomes measured
COVID-19
6 sites across 5 states
Missouri2
Georgia1
Maryland1
Massachusetts1
Texas1

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  • Occurrence of abnormal clinical safety laboratory adverse events (AE).Through Day 8
  • Occurrence of adverse events of special interest (AESI).Through 6 months post study product administration
  • Occurrence of medically attended adverse events (MAAEs).Through 6 months post study product administration
  • Occurrence of new-onset chronic medical conditions (NOCMCs).Through 6 months post study product administration
  • Occurrence of serious adverse events (SAEs).Through 6 months post study product administration
  • Occurrence of solicited local adverse events (AEs).Through Day 8
  • Occurrence of solicited systemic adverse events (AEs).Through Day 8
  • Occurrence of unsolicited adverse events (AEs).Through Day 29