Skip to main content
Clinical Trials/NCT07051031
NCT07051031Active, not recruitingPhase 4

Reactogenicity, Patient Reported Outcomes and Vaccine Preference in Adults Immunized With Recombinant Protein or mRNA COVID-19 Vaccines

Marcel Curlin1 site in 1 country1,000 target enrollmentStarted: October 1, 2025Last updated:
Interventions

Trial Snapshot

Phase
Phase 4
Status
Active, not recruiting
Sponsor
Enrollment
1,000
Locations
1
Primary Endpoint
Number of Participants Reporting ≥1 Systemic Symptom Within 7 Days Post-Vaccination

Study Overview

Brief Summary

The purpose of this study is to compare post-vaccination reactions between the protein-based Novavax vaccine and the mNEXSPIKE mRNA-1283 vaccine. Specifically, the study aims to determine the rate of participant-reported symptoms associated with each type of vaccine.

Detailed Description

Why is this study being conducted? Many individuals receive a flu vaccine each year, but fewer receive the COVID-19 booster, even though COVID-19 infection can be more severe. One possible reason is concern about vaccine side effects.

The goal of this study is to determine whether a different type of COVID-19 vaccine, called Novavax, causes fewer side effects than the more commonly used mRNA vaccines (such as Pfizer or Moderna) when administered as a seasonal booster.

What is Novavax? Novavax is a protein-based COVID-19 vaccine approved by the FDA. Earlier studies suggest that fewer side effects may occur with Novavax; however, not many studies have directly compared Novavax with mRNA vaccines

What is the purpose of this study? Eligible individuals who qualify for a COVID-19 booster are invited to participate. Participants will receive either the Novavax vaccine or an mRNA vaccine. After vaccination, participants will be asked to report any symptoms or side effects experienced. Collected information will help determine which vaccine may be better tolerated.

Why does this matter? By comparing participant experiences, this study aims to identify ways to improve acceptance and accessibility of COVID-19 booster vaccines. Findings may help increase public confidence in vaccination and support ongoing protection against COVID-19.

Study Design

Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel
Primary Purpose
Prevention
Masking
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Eligibility Criteria

Ages
18 Years to — (Adult, Older Adult)
Sex
All
Accepts Healthy Volunteers
Yes

Inclusion Criteria

  • Adults eligible for seasonal COVID-19 vaccine, ages 18 and older Signed informed consent form (ICF) and agree to participate in the study Prior receipt of one or more COVID-19 vaccines

Exclusion Criteria

  • If a person is experiencing a moderate or severe illness or infection (as judged by the study investigator) or has a fever (temperature of 38.0°C or higher) on the day they are supposed to participate in the study, they should not join until they are feeling better and the fever is gone.
  • Anyone with a medical or mental health issue, or problems with substance use that might make taking part in the study risky
  • People who have had a severe allergic reaction to COVID-19 vaccines in the past
  • Those who have been diagnosed with inflammation in or around the heart after receiving a COVID-19 vaccine
  • Individuals who have received any other vaccine within a week before joining the study or who plan to get a vaccine on the same day as the study or within 7 days afterward

Arms & Interventions

Novavax Vaccine

Experimental

Protein-based vaccine

Intervention: Nuvaxovid (NVX-CoV2705) (Drug)

mNEXSPIKE mRNA-1283

Experimental

mRNA-based vaccine

Intervention: mNEXSPIKE mRNA-1283 (Drug)

Outcomes

Primary Outcomes

Number of Participants Reporting ≥1 Systemic Symptom Within 7 Days Post-Vaccination

Time Frame: within 7 days post vaccination

Proportion and number of participants who report at least one systemic symptom (e.g., fever, fatigue, myalgia, headache, chills) within 7 days following COVID-19 booster vaccination, as collected via daily symptom diary.

Secondary Outcomes

No secondary outcomes reported

Investigators

Sponsor
Marcel Curlin
Sponsor Class
Other
Responsible Party
Sponsor Investigator
Principal Investigator

Marcel Curlin

Medical Director

Oregon Health and Science University

Study Sites (1)

Loading locations...

Similar Trials