Flu vaccine research study · Plant City, FL
75 or older?
If you see a medical professional at least once a week, you may qualify for a seasonal flu vaccine study at Denali Health.
- $150for each study visit you complete
- Everyone gets a flu vaccine — no placebo
- Free rides to and from every visit
- No insurance needed, and no cost to you
Talk to a real person: Mon–Fri, 8:00am to 5:00pm.
What you get
Nothing to pay. Nothing to arrange.
No placebo
Everyone gets a flu vaccine
You receive either the investigational mRNA vaccine or a licensed flu vaccine approved for your age. Nobody gets a dummy shot.
$150
For each visit you complete
Paid after every completed study visit, for your time and travel. There is nothing to pay and no insurance is needed.
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The real ride: a Denali driver (friendly, ordinary clothes) helping a participant into the car or van at their own front door. Natural daylight.
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We drive you
A ride to and from every visit, booked by our team. No driving, no parking, no favors to ask.
The rides made it easy. I never had to worry about getting there.
A team you can call
One phone number and real people who know your name, all season long.
In their own words
What people say about Denali Health.
They took the time to answer every question I had.
Steve LeeResearch participant The staff was wonderful. I will recommend Denali to my friends.
Vivian FranklinResearch participant Great experience. Love the staff. Highly recommend.
Darius BennetResearch participant
Three steps
From this page to your visit.
You can stop after any one of them.
Step 1: Answer 4 quick questions
Right here on this page. It takes about a minute.
Step 2: We call you within 1 business day
We answer your questions and, if it is a fit, book your first visit.
Step 3: Come in for your vaccine
We arrange your ride. You get your vaccine that same day.
Say no at any point and that is a complete answer. Nothing changes about the care you get from your own doctor.
See if you qualifyWhy it matters
The flu is harder on us as we get older.
70–85%
of U.S. seasonal flu deaths are adults 65 and older
50–70%
of U.S. flu hospital stays are adults 65 and older
9 in 10
flu hospital stays involve a long-term health condition
Source: U.S. Centers for Disease Control and Prevention, “Flu and People 65 Years and Older.” Figures are estimates and vary by season. They describe seasonal flu in general, not the vaccine being studied.
The study
What you are signing up for.
One shot at your first visit
Either the investigational mRNA vaccine or a licensed flu vaccine approved for your age.
6–8 months one flu season
A few follow-up visits and phone check-ins after that first visit.
75+ in stable health
Long-term conditions are usually fine if they have been stable for 3 months.
A Phase 3 research study of an investigational mRNA flu vaccine. “Investigational” means it is still being studied and is not FDA approved. Taking part is voluntary — you can stop at any time, for any reason, and it will not affect the care you get from your own doctor.
Eligibility
Do I qualify?
The short version. Unsure about a line? Call and ask.
You may qualify if you:
- Yes: Are 75 years of age or older
- Yes: Visit a doctor at least once a month
- Yes: Have not received a flu vaccine in the last 6 months
- Yes: Can attend clinic visits in Plant City, FL
- Yes: You are in generally stable health
- Yes: Long-term conditions are usually fine (diabetes, heart disease, blood pressure — stable for 3 months)
- Yes: You are willing to log how you feel in a simple app or a device we provide
Additional eligibility requirements apply.
You may not qualify if
- Not eligible: You have had a flu shot in the last 6 months
- Not eligible: You have had lab-confirmed flu in the last 6 months
- Not eligible: You are allergic to flu vaccines or a previous mRNA vaccine
- Not eligible: You have had myocarditis after an mRNA vaccine
Already had this season’s flu shot? A future season may still work. Tell us and we will follow up.
These lists are a starting point, not a decision. The study team makes the call with you.
See if you qualifyQuestions
Questions people ask us
It is a Phase 3 research study of an investigational mRNA vaccine for seasonal flu. Researchers want to learn how the body responds to it, and how people tolerate it, compared with a flu vaccine that is already licensed. “Investigational” means it is still being studied and is not approved by the FDA.
No. There is no placebo in this study. Everyone who joins receives a flu vaccine — either the investigational mRNA vaccine or a licensed seasonal flu vaccine approved for your age group. Which one you get is decided at random, and the study team measuring your results does not know which you received.
That is exactly the kind of question research studies are designed to answer, so we cannot tell you the investigational vaccine is safe — it is still being studied. What we can tell you is what is known: mRNA vaccines have been given to hundreds of millions of people for COVID-19 and are closely monitored. The mRNA breaks down quickly in the body and does not enter the part of your cells that holds your DNA.
Before you decide anything, the study team goes through the full consent form with you, including the known and possible risks and side effects, and you can take it home to read or discuss with your own doctor.
If you have had a flu shot in the last 6 months, you cannot join this study right now. Tell us anyway — we can note your interest and follow up for a future season or another study you may be a fit for.
There is no cost to you for study visits or study-related procedures, and you do not need insurance to take part. You also receive $150 for each completed visit and transportation to and from every visit.
Many people with long-term conditions like these can still take part. What matters is that the condition has been stable for the last 3 months. Bring your medication list to your first visit and the study team will go through it with you.
The study runs about 6 to 8 months — one flu season, start to finish. You get one injection in the arm at your first visit. After that there are a small number of follow-up visits plus a few phone or video check-ins. Your coordinator gives you the full schedule up front so you can see it against your calendar.
You use a simple app, or a device we provide, to log how you are feeling during flu season. It takes a minute or two. If you come down with flu-like symptoms, you collect a nasal swab at home — a soft swab just inside the nostril, nothing deep — so the team can find out whether it was flu. We show you exactly how, and you can always call us and we will walk you through it.
Yes. Taking part is completely voluntary. You may stop at any time, for any reason, and you do not have to explain yourself. Stopping does not affect the care you receive from your regular doctor in any way.
Yes. This study does not replace your regular doctor or your regular medical care. With your permission we can keep your doctor informed about your participation.
Your information is used by the study team and shared only as the consent form describes — for example with the study sponsor and the independent review board that oversees the study, and with health authorities if required. Records that identify you are kept confidential. We do not sell your information, and we do not share it with anyone for marketing.
Still have questions? Call or text (813) 796-6716.
Getting here
Where to find us
We are on West Reynolds Street in Plant City. Here is exactly what you will see when you arrive.
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The actual front entrance at 1601 W Reynolds St, Suite 203 — sign readable, door and any ramp visible, shot from where a visitor gets out of the car.
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The parking lot as seen from the entrance — show how close the spaces (and any accessible spaces) are to the door.
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- Denali Health Plant City1601 W Reynolds St, Suite 203Plant City, FL 33563
- HoursMonday to Friday, 8:00am to 5:00pmSaturday, 9:00am to 1:00pm by appointment
- Call or text(813) 796-6716
- Emailinfo@denali-health.com
- Getting here is on usTransportation to and from every study visit is provided. If driving or parking is a worry, say so when we call and we will arrange your ride.
Refer a friend
Know someone who may qualify?
A friend, neighbor or relative who is 75 or older and sees a doctor regularly may be a good fit.
Or just send them this page:
Or give them our number: (813) 796-6716
75 or older?
See if you qualify in about a minute — or call and talk it through with a real person first. $150 for each completed visit, and the ride is on us.