Covid19NCT04951310
COVID-19 Vaccinations With a Sweepstakes
A study testing Philly Vax Sweepstakes in people with Covid19, run by University of Pennsylvania at 1 site in United States.
Trial summary
To reach herd immunity for COVID-19, experts estimate that 70% of the population will need to be vaccinated. However, vaccination rates have begun to slow down in the United States. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Covid19
- What is being tested?
- Philly Vax Sweepstakes
- Type of treatment
- Vaccines, Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 3,827,656 participants
- Where
- 1 siteUnited States
- Study dates
- 7 Jun 2021to 14 Aug 2021
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- All 18+ residents of the City of Philadelphia will be eligible. Residents will be able to win the sweepstakes prizes if they can verify they received at least one dose of the COVID-19 vaccine before the date of the sweepstakes drawing in question.
Who cannot join
- None.
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Pennsylvania
Philadelphia, Pennsylvania, 19104
About this study
To reach herd immunity for COVID-19, experts estimate that 70% of the population will need to be vaccinated. However, vaccination rates have begun to slow down in the United States. The investigators will partner with Philadelphia to launch a COVID-19 vaccination sweepstakes, in which residents will be eligible to win if they have received at least one dose of the COVID-19 vaccine prior to a given drawing. Drawings will be held every two weeks; multiple prizes of various sizes will be awarded in each drawing. Half of the prizes in each size category in each drawing will be awarded to residents of a zip code that is randomly selected from a pre-defined list of under-vaccinated zip codes (this zip code will be announced at the start of each 2-week drawing period), the other half will be awarded to residents outside of that selected zip code. The investigators will analyze vaccination rates in Philadelphia as compared with neighboring regions before, during, and after the specified time period, as well as analyze vaccination rates in the three selected zip codes compared to the other zip codes that could have been targeted (the residual set of under-vaccinated zip codes) to determine the effectiveness of the sweepstakes at encouraging vaccinations.
- Conditions
- Covid19
- Being tested
- Philly Vax Sweepstakes
- Keywords
- COVID19 vaccination, Behavioral science interventions, Vaccination promotion
- Medical subject headings
- COVID-19
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Philly Vax SweepstakesBehavioural
The "Philly Vax Sweepstakes" is a citywide sweepstakes designed to motivate Philadelphians to get vaccinated against COVID-19. A total of 36 vaccinated Philadelphians will win among three cash prize packages, distributed from the total cash pool. These 36 will be chosen over three drawings, with 12 residents chosen in each drawing.
| Study group | Role | What they receive |
|---|---|---|
| Control | No intervention | No Intervention: Control participants (residents of Bucks County, Montgomery County, Delaware County, and Allegheny County, PA) are not eligible for the sweepstakes. |
| Selected Zip Code Treatment | Experimental | Selected Zip Code Treatment participants will have a significantly greater chance to win a prize in the sweepstakes than all other Philadelphia residents. Half of all prizes in every drawing will go to Philadelphia residents in the selected zip code. Receives: Behavioral: Philly Vax Sweepstakes |
| All other Philadelphia Residents Treatment | Experimental | All other Philadelphia Residents Treatment participants will be eligible for the sweepstakes. Half of all prizes in every drawing will go to Philadelphia residents outside of the selected zip code. Receives: Behavioral: Philly Vax Sweepstakes |
What is being measured
The primary outcome is the main question the study is designed to answer.
Weekly Vaccinations Per 100k Residents
The primary outcome is the weekly vaccinations (per 100k residents) for residents receiving a first dose of a COVID-19 vaccination in each zip/county/city, relative to the control group. The vaccination data was measured by local health departments and the residency data was measured by the U.S. Census. The investigators included data from 5 weeks of pre-intervention, 6 weeks of intervention, and 4 weeks of post-intervention. Weekly Vaccinations per 100k Residents = 100,000 * Total residents receiving a first dose that week / Total residents in that zip/county/city code as measured by the Census or other official sources, at the most recent date available for all geographies of interest.
Measured: 15 Weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jul 2021
- Study start7 Jun 2021
- Primary completion14 Aug 2021
- Study completion14 Aug 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Covid19Studies of the same condition, open and under way.
- More trials run by University of PennsylvaniaThe 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
- None (open label)
- Enrolment
- 3,827,656 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Pennsylvania
- Sponsor type
- University, hospital or other
- Collaborators
- Philadelphia Department of Public Health
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04951310
- Sponsor's protocol ID
- 849044
- Status last verified
- Jan 2025
- First submitted
- 16 Jun 2021
- Last updated
- 3 Feb 2025
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 3 Feb 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- COVID-19 Vaccinations With a Sweepstakes
- ClinicalTrials.gov ID
- NCT04951310
- Acronym / sponsor ID
- 849044
- Conditions
- Covid19
- Keywords
- COVID19 vaccination, Behavioral science interventions, Vaccination promotion
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 3,827,656 participants (actual)
- Lead sponsor
- University of PennsylvaniaUniversity, hospital or other
- Collaborators
- Philadelphia Department of Public Health
- Study start
- 7 Jun 2021 (actual)
- Primary completion
- 14 Aug 2021 (actual)
- Study completion
- 14 Aug 2021 (actual)
- First posted
- 6 Jul 2021 (actual)
- Results
- Posted 3 Feb 2025
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
To reach herd immunity for COVID-19, experts estimate that 70% of the population will need to be vaccinated. However, vaccination rates have begun to slow down in the United States. The investigators will partner with Philadelphia to launch a COVID-19 vaccination sweepstakes, in which residents will be eligible to win if they have received at least one dose of the COVID-19 vaccine prior to a given drawing. Drawings will be held every two weeks; multiple prizes of various sizes will be awarded in each drawing. Half of the prizes in each size category in each drawing will be awarded to residents of a zip code that is randomly selected from a pre-defined list of under-vaccinated zip codes (this zip code will be announced at the start of each 2-week drawing period), the other half will be awarded to residents outside of that selected zip code. The investigators will analyze vaccination rates in Philadelphia as compared with neighboring regions before, during, and after the specified time period, as well as analyze vaccination rates in the three selected zip codes compared to the other zip codes that could have been targeted (the residual set of under-vaccinated zip codes) to determine the effectiveness of the sweepstakes at encouraging vaccinations.
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Control | No intervention | –No Intervention: Control participants (residents of Bucks County, Montgomery County, Delaware County, and Allegheny County, PA) are not eligible for the sweepstakes. |
| Selected Zip Code Treatment | Experimental | Behavioral: Philly Vax SweepstakesSelected Zip Code Treatment participants will have a significantly greater chance to win a prize in the sweepstakes than all other Philadelphia residents. Half of all prizes in every drawing will go to Philadelphia residents in the selected zip code. |
| All other Philadelphia Residents Treatment | Experimental | Behavioral: Philly Vax SweepstakesAll other Philadelphia Residents Treatment participants will be eligible for the sweepstakes. Half of all prizes in every drawing will go to Philadelphia residents outside of the selected zip code. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- All 18+ residents of the City of Philadelphia will be eligible. Residents will be able to win the sweepstakes prizes if they can verify they received at least one dose of the COVID-19 vaccine before the date of the sweepstakes drawing in question.
Key exclusion criteria (1 listed)
- None.
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 |
|---|---|---|
| Philly Vax SweepstakesThe "Philly Vax Sweepstakes" is a citywide sweepstakes designed to motivate Philadelphians to get vaccinated against COVID-19. A total of 36 vaccinated Philadelphians will win among three cash prize packages, distributed from the total cash pool. These 36 will be chosen over three drawings, with 12 residents chosen in each drawing. | Behavioural | All other Philadelphia Residents Treatment, Selected Zip Code Treatment |
Primary outcome
Weekly Vaccinations Per 100k Residents
Time frame: 15 Weeks
The primary outcome is the weekly vaccinations (per 100k residents) for residents receiving a first dose of a COVID-19 vaccination in each zip/county/city, relative to the control group. The vaccination data was measured by local health departments and the residency data was measured by the U.S. Census. The investigators included data from 5 weeks of pre-intervention, 6 weeks of intervention, and 4 weeks of post-intervention. Weekly Vaccinations per 100k Residents = 100,000 * Total residents receiving a first dose that week / Total residents in that zip/county/city code as measured by the Census or other official sources, at the most recent date available for all geographies of interest.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Feb 2025.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: No
Related trials for Covid19
Not yet recruitingPhase 1
A Safety, Reactogenicity and Immunogenicity Trial of RVX-sCPD9 Booster Intranasal COVID-19 Vaccine
COVID -19
Not yet recruitingPhase 3
Dapagliflozin for Long COVID Syndrome
COVID - 19, Long COVID Syndrome
RecruitingPhase 1
A Safety and Immunogenicity Trial of OCU500, ChAd36 Vector Encoding SARS-CoV-2 Spike Vaccine Via Intranasal and Inhalational Routes in Previously Vaccinated Adults
COVID-19
Active, not recruitingObservational study
Analysis of Coronavirus Disease 19 (COVID-19) Convalescent Plasma
Asymptomatic COVID-19 Infection Laboratory-Confirmed, Symptomatic COVID-19 Infection Laboratory-Confirmed
Not yet recruitingPhase 1
Phase I Open-Label Safety Trial of Pembrolizumab for Neurological Post- Acute Sequelae of SARS-CoV-2 (PD1-PASC I)
Post-Acute COVID-19 Syndrome
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. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Philly Vax Sweepstakes in people with Covid19, run by University of Pennsylvania at 1 site in United States.
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 1 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: finished, as of the sponsor's last update on 3 Feb 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. 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?
Yes. Results are posted in the registry (first posted 3 Feb 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Weekly Vaccinations Per 100k Residents (time frame: 15 Weeks). 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 Feb 2025.