AttitudesNCT07102472
An Experiment Comparing Public Reactions to the Labels "Community Immunity" Versus "Herd Immunity".
A study testing Using the term "community immunity" instead of "herd immunity" and Herd immunity in people with Attitudes, run by Laval University.
Trial summary
Participants are shown a scenario consisting of static images from a previous study ("herdimm") showing a visualization of how herd immunity works. Participants are randomized to see the text with the term "herd immunity" or "community immunity." Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Attitudes
- What is being tested?
- Using the term "community immunity" instead of "herd immunity" and Herd immunity
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 350 participants
- Where
- No sites listed yet
- Study dates
- 22 Jul 2025to 31 Aug 2025
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Able to use a computer
- Able to use the internet
- Able to read and respond to questions in English or French
- 18+ years old and living in Canada
Who cannot join
- Unable to view images on a computer
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Community Immunity Versus Herd Immunity
Participants are shown a scenario consisting of static images from a previous study ("herdimm") showing a visualization of how herd immunity works. Participants are randomized to see the text with the term "herd immunity" or "community immunity."
- Conditions
- Attitudes
- Being tested
- Using the term "community immunity" instead of "herd immunity", Herd immunity
- Medical subject headings
- Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Using the term "community immunity" instead of "herd immunity"Behavioural
In the intervention arm, participants are shown the less traditional term "community immunity" in place of the more traditional "herd immunity"
Herd immunityBehavioural
Using the traditional term "herd immunity"
| Study group | Role | What they receive |
|---|---|---|
| Herd immunity | Placebo comparator | Not described Receives: Behavioral: Herd immunity |
| Community immunity | Experimental | Not described Receives: Behavioral: Using the term "community immunity" instead of "herd immunity" |
What is being measured
The primary outcome is the main question the study is designed to answer.
Orientation towards protection of others
A measure of the extent to which people believe that individual vaccination behavior is important to protect others. Question wording: "When a safe and effective vaccine exists that can prevent people from catching and passing on a contagious disease, it is important for people to get vaccinated to protect ..." Measured across two to three items (family, others in the community, people who are more vulnerable to disease) on a 7-point Likert-type scale (strongly disagree = 1, strongly agree = 7).
Measured: Immediately after the intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Aug 2025
- Study start22 Jul 2025 (estimated)
- Primary completion31 Aug 2025 (estimated)
- Study completion31 Aug 2025 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for AttitudesStudies of the same condition, open and under way.
- More trials run by Laval UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 350 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Laval University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07102472
- Sponsor's protocol ID
- commimm
- Status last verified
- Jul 2025
- First submitted
- 28 Jul 2025
- Last updated
- 3 Aug 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: Anonymized data will be deposited on Borealis, Laval University's official data repository.
Study at a glance
From the registry record, last updated by the sponsor on 3 Aug 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Community Immunity Versus Herd Immunity
- ClinicalTrials.gov ID
- NCT07102472
- Acronym / sponsor ID
- commimm
- Conditions
- Attitudes
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 350 participants (estimated)
- Lead sponsor
- Laval UniversityUniversity, hospital or other
- Study start
- 22 Jul 2025 (estimated)
- Primary completion
- 31 Aug 2025 (estimated)
- Study completion
- 31 Aug 2025 (estimated)
- First posted
- 3 Aug 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Participants are shown a scenario consisting of static images from a previous study ("herdimm") showing a visualization of how herd immunity works. Participants are randomized to see the text with the term "herd immunity" or "community immunity."
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Herd immunity | Placebo comparator | Behavioral: Herd immunity |
| Community immunity | Experimental | Behavioral: Using the term "community immunity" instead of "herd immunity" |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Able to use a computer
- Able to use the internet
- Able to read and respond to questions in English or French
- 18+ years old and living in Canada
Key exclusion criteria (1 listed)
- Unable to view images on a computer
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Using the term "community immunity" instead of "herd immunity"In the intervention arm, participants are shown the less traditional term "community immunity" in place of the more traditional "herd immunity" | Behavioural | Community immunity |
| Herd immunityUsing the traditional term "herd immunity" | Behavioural | Herd immunity |
Primary outcome
Orientation towards protection of others
Time frame: Immediately after the intervention
A measure of the extent to which people believe that individual vaccination behavior is important to protect others. Question wording: "When a safe and effective vaccine exists that can prevent people from catching and passing on a contagious disease, it is important for people to get vaccinated to protect ..." Measured across two to three items (family, others in the community, people who are more vulnerable to disease) on a 7-point Likert-type scale (strongly disagree = 1, strongly agree = 7).
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Aug 2025.
- Individual participant dataSharing planned: Yes. Anonymized data will be deposited on Borealis, Laval University's official data repository.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Questions about this trial
What is this clinical trial studying?
A study testing Using the term "community immunity" instead of "herd immunity" and Herd immunity in people with Attitudes, run by Laval University.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 3 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Holly Witteman, PhD (418-656-2131, holly.witteman@fmed.ulaval.ca), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Orientation towards protection of others (time frame: Immediately after the intervention). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Aug 2025.