A Study To Learn About The Study Vaccine (Called Self-Amplifying Ribonucleic Acid (RNA)) For The Prevention of Influenza

Study Overview
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Brief Summary
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The purpose of this clinical trial is to learn about the safety and effects of the study vaccine for the potential prevention of influenza. The study vaccine is called Self-Amplifying Ribonucleic Acid vaccine (saRNA vaccine). This study is seeking participants who: Are between the age of 18 to 49 years old. Are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures. Are healthy as determined by medical history, physical examinations, and the study doctor. For male participants, can father children and willing to use an acceptable method of contraception. Female participants who are not of childbearing potential; or male participant not able to father children. Are capable of giving signed informed consent. Participants will receive either the saRNA vaccine, a licensed Influenza Vaccine (QIV) or a placebo. Participants will not know which vaccine they receive in advance. A placebo does not have any medicine in it but looks just like the study medicine. Participants will receive the study vaccines as a single shot in the arm. We will compare participant experiences to help us determine if the saRNA vaccine is safe and effective. Participants will take part in this study for 6 months. During this time, they will receive the study vaccine and participate in follow-up visits.

Official Title
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A PHASE 1, PLACEBO-CONTROLLED, RANDOMIZED, OBSERVER-BLIND, DOSE-FINDING STUDY TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF SELF-AMPLIFYING RNA VACCINE PREPARATIONS AGAINST INFLUENZA IN HEALTHY INDIVIDUALS

Conditions
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Influenza, Human

Intervention / Treatment
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* Biological: PF-07852352 Influenza saRNA 1
* Biological: PF-07836391 Influenza saRNA
* Biological: PF-07836394 Influenza saRNA
* Biological: PF-07836395 Influenza saRNA
* Biological: PF-07836396 Influenza saRNA
* Biological: PF-07867246 Influenza saRNA
* Biological: Placebo
* Biological: Quadrivalent influenza vaccine (QIV)
* Biological: PF-07871987 Influenza saRNA
* Biological: PF-07914705 Influenza saRNA
* Biological: PF-07915048 Influenza saRNA


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female participants 18 to 49 years of age. Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures. Healthy participants who are determined by medical history, physical examination (if required), and clinical judgment of the investigator to be eligible for inclusion in the study. Male participant who is able to father children and willing to use an acceptable method of contraception; or female participant not of childbearing potential; or male participant not able to father children. Capable of giving signed informed consent. Exclusion Criteria: Other medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study. History of severe adverse reaction associated with a vaccine and/or severe allergic reaction (eg, anaphylaxis) to any component of the study intervention. Immunocompromised individuals with known or suspected immunodeficiency, as determined by history and/or laboratory/physical examination. Bleeding diathesis or condition associated with prolonged bleeding that would, in the opinion of the investigator, contraindicate intramuscular injection. Women who are pregnant or breastfeeding. Allergy to egg proteins (egg or egg products) or chicken proteins. Participant who has had significant exposure to laboratory-confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2 infection), coronavirus disease 2019 (COVID-19), or influenza in the past 14 days known prior to Visit 1 Any participant who has a SARS-CoV-2 RT-PCR or antigen test in the past 10 days prior to Visit 1 that has not been confirmed as negative. Individuals who receive treatment with radiotherapy or immunosuppressive therapy, including cytotoxic agents or systemic corticosteroids, eg, for cancer or an autoimmune disease, or planned receipt throughout the study. Receipt of blood/plasma products, immunoglobulin, or monoclonal antibodies, from 60 days before study intervention administration, or planned receipt throughout the study. Vaccination with any influenza vaccine within 6 months (175 days) before study intervention administration. Any participant who has received or plans to receive a nucleoside-modified messenger ribonucleic acid (modRNA)-platform SARS-CoV-2 vaccine within 60 days of Visit 1 Previous vaccination with an saRNA or an alphavirus replicon vaccine preparation. Participation in other studies involving study intervention within 28 days prior to study entry and/or during study participation. Screening hematology/blood chemistry lab >=Grade 1 abnormality. Except Bilirubin, other stable Grade1 abnormalities may be considered eligible by Investigator. Screening electrocardiogram (ECG) that is consistent with probable or possible myocarditis or pericarditis, or demonstrates clinically relevant abnormalities that may affect participant safety or study results. Investigator site staff or Pfizer employees directly involved in the conduct of the study, site staff otherwise supervised by the investigator, and their respective family members. Participation in strenuous or endurance exercise through Visit 3. Prior history of heart disease.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 49 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Sequential Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: PF-07852352 Influenza saRNA, low dose<br> | Biological: PF-07852352 Influenza saRNA 1<br>* Intramuscular injection<br>|
| Experimental: PF-07852352 Influenza saRNA, mid dose<br> | Biological: PF-07852352 Influenza saRNA 1<br>* Intramuscular injection<br>|
| Experimental: PF-07852352 Influenza saRNA, high dose<br> | Biological: PF-07852352 Influenza saRNA 1<br>* Intramuscular injection<br>|
| Experimental: PF-07836391 Influenza saRNA, low dose<br> | Biological: PF-07836391 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836391 Influenza saRNA, mid dose<br> | Biological: PF-07836391 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836391 Influenza saRNA, high dose<br> | Biological: PF-07836391 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836394 Influenza saRNA, low dose<br> | Biological: PF-07836394 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836394 Influenza saRNA, mid dose<br> | Biological: PF-07836394 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836394 Influenza saRNA, high dose<br> | Biological: PF-07836394 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836395 Influenza saRNA, low dose<br> | Biological: PF-07836395 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836395 Influenza saRNA, mid dose<br> | Biological: PF-07836395 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836395 Influenza saRNA, high dose<br> | Biological: PF-07836395 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836396 Influenza saRNA, low dose<br> | Biological: PF-07836396 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836396 Influenza saRNA, mid dose<br> | Biological: PF-07836396 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07836396 Influenza saRNA, high dose<br> | Biological: PF-07836396 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07867246 Influenza saRNA, mid dose<br> | Biological: PF-07867246 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07867246 Influenza saRNA, low dose<br> | Biological: PF-07867246 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07867246 Influenza saRNA, high dose<br> | Biological: PF-07867246 Influenza saRNA<br>* Intramuscular injection<br>|
| Placebo Comparator: Placebo<br> | Biological: Placebo<br>* Intramuscular injection<br>|
| Active Comparator: Quadrivalent influenza vaccine (QIV)<br> | Biological: Quadrivalent influenza vaccine (QIV)<br>* Intramuscular injection<br>|
| Experimental: PF-07871987 Influenza saRNA, low dose<br> | Biological: PF-07871987 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07871987 Influenza saRNA, mid dose<br> | Biological: PF-07871987 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07871987 Influenza saRNA, high dose<br> | Biological: PF-07871987 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07914705 Influenza saRNA mid dose<br> | Biological: PF-07914705 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07914705 Influenza saRNA, high dose<br> | Biological: PF-07914705 Influenza saRNA<br>* Intramuscular injection<br>|
| Experimental: PF-07915048 Influenza saRNA, high dose<br> | Biological: PF-07915048 Influenza saRNA<br>* Intramuscular injection<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of participants reporting local reactions | Pain at the injection site, redness, and swelling, as self-reported in electronic diaries. | For 10 days after vaccination | 
| Percentage of participants reporting systemic events | Fever, fatigue, headache, chills, vomiting, diarrhea, new or worsened muscle pain, and new or worsened joint pain, as self reported in electronic diaries. | For 10 days after vaccination | 
| Percentage of participants reporting adverse events | As elicited by investigational site staff. | From vaccination to 4 weeks after vaccination | 
| Percentage of participants reporting serious adverse events | As elicited by investigational site staff. | From vaccination to 6 months after vaccination | 
| Percentage of participants with abnormal hematology and chemistry laboratory values | As measured at the central laboratory | 2 days after vaccination | 
| Percentage of participants with abnormal hematology and chemistry laboratory values | As measured at the central laboratory | 1 week after vaccination | 
| Percentage of participants with grading shifts in hematology and chemistry laboratory assessments | As measured at the central laboratory. | Between baseline and 2 days after vaccination | 
| Percentage of participants with grading shifts in hematology and chemistry laboratory assessments | As measured at the central laboratory | Between baseline and 1 week after vaccination | 
| Percentage of participants with new electrocardiogram (ECG) abnormalities | ECG abnormalities consistent with probable or possible myocarditis or pericarditis, as judged by a cardiologist | 2 days after vaccination | 
| Percentage of participants with new ECG abnormalities | ECG abnormalities consistent with probable or possible myocarditis or pericarditis, as judged by a cardiologist | 1 week after vaccination | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Geometric mean titers (GMTs) of hemagglutination inhibition (HAI) titers | As measured at the central laboratory | At Baseline, and 1-, 2- and 4-weeks after vaccination | 
| Geometric mean fold rise (GMFR) in HAI titers from before vaccination to each subsequent timepoint | As measured at the central laboratory | At Baseline, and 1-, 2- and 4-weeks after vaccination | 
| Proportion of participants achieving HAI seroconversion for each strain | As measured at the central laboratory | At 1-, 2-, and 4-weeks after vaccination | 
| Proportion of participants with HAI titer >=1:40 for each strain | As measured at the central laboratory | At Baseline, and 1-, 2-, and 4-weeks after vaccination | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Grippe, Flu, Influenza, Vaccine, RNA vaccine, Self-amplifying