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PF-07852352 Influenza saRNA 1

Phase 1

Influenza, Human | Monoclonal antibody | Infectious Disease |Pfizer, Inc.|Last Updated: Mar 20, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment440

FDA Designations

No designations recorded

Clinical trial landscape

PF-07852352 Influenza saRNA 1 · 1 trial · 1 indication

Phase 1 1
NCT05227001A Study To Learn About The Study Vaccine (Called Self-Amplifying Ribonucleic Acid (RNA)) For The Prevention of InfluenzaInfluenza, Human
COMPLETED440 Analytics
PHASE1COMPLETED
A Study To Learn About The Study Vaccine (Called Self-Amplifying Ribonucleic Acid (RNA)) For The Prevention of Influenza
Influenza, HumanUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of participants reporting local reactions
For 10 days after vaccination

Pain at the injection site, redness, and swelling, as self-reported in electronic diaries.

Percentage of participants reporting systemic events
For 10 days after vaccination

Fever, fatigue, headache, chills, vomiting, diarrhea, new or worsened muscle pain, and new or worsened joint pain, as self reported in electronic diaries.

Percentage of participants reporting adverse events
From vaccination to 4 weeks after vaccination

As elicited by investigational site staff.

Percentage of participants reporting serious adverse events
From vaccination to 6 months after vaccination

As elicited by investigational site staff.

Percentage of participants with abnormal hematology and chemistry laboratory values
2 days after vaccination

As measured at the central laboratory

Percentage of participants with grading shifts in hematology and chemistry laboratory assessments
Between baseline and 2 days after vaccination

As measured at the central laboratory.

Percentage of participants with new electrocardiogram (ECG) abnormalities
2 days after vaccination

ECG abnormalities consistent with probable or possible myocarditis or pericarditis, as judged by a cardiologist

Percentage of participants with new ECG abnormalities
1 week after vaccination

ECG abnormalities consistent with probable or possible myocarditis or pericarditis, as judged by a cardiologist

Secondary Endpoints

Geometric mean titers (GMTs) of hemagglutination inhibition (HAI) titers
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
At Baseline, and 1-, 2- and 4-weeks after vaccination
Proportion of participants achieving HAI seroconversion for each strain
At 1-, 2-, and 4-weeks after vaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
PF-07852352 Influenza saRNA, low doseEXPERIMENTAL -
PF-07852352 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07852352 Influenza saRNA, high doseEXPERIMENTAL -
PF-07836391 Influenza saRNA, low doseEXPERIMENTAL -
PF-07836391 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07836391 Influenza saRNA, high doseEXPERIMENTAL -
PF-07836394 Influenza saRNA, low doseEXPERIMENTAL -
PF-07836394 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07836394 Influenza saRNA, high doseEXPERIMENTAL -
PF-07836395 Influenza saRNA, low doseEXPERIMENTAL -
PF-07836395 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07836395 Influenza saRNA, high doseEXPERIMENTAL -
PF-07836396 Influenza saRNA, low doseEXPERIMENTAL -
PF-07836396 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07836396 Influenza saRNA, high doseEXPERIMENTAL -
PF-07867246 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07867246 Influenza saRNA, low doseEXPERIMENTAL -
PF-07867246 Influenza saRNA, high doseEXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -
Quadrivalent influenza vaccine (QIV)ACTIVE_COMPARATOR -
PF-07871987 Influenza saRNA, low doseEXPERIMENTAL -
PF-07871987 Influenza saRNA, mid doseEXPERIMENTAL -
PF-07871987 Influenza saRNA, high doseEXPERIMENTAL -
PF-07914705 Influenza saRNA mid doseEXPERIMENTAL -
PF-07914705 Influenza saRNA, high doseEXPERIMENTAL -
PF-07915048 Influenza saRNA, high doseEXPERIMENTAL -

Interventions

NameTypeDescription
PF-07852352 Influenza saRNA 1BIOLOGICALIntramuscular injection
PF-07836391 Influenza saRNABIOLOGICALIntramuscular injection
PF-07836394 Influenza saRNABIOLOGICALIntramuscular injection
PF-07836395 Influenza saRNABIOLOGICALIntramuscular injection
PF-07836396 Influenza saRNABIOLOGICALIntramuscular injection
PF-07867246 Influenza saRNABIOLOGICALIntramuscular injection
PlaceboBIOLOGICALIntramuscular injection
Quadrivalent influenza vaccine (QIV)BIOLOGICALIntramuscular injection
PF-07871987 Influenza saRNABIOLOGICALIntramuscular injection
PF-07914705 Influenza saRNABIOLOGICALIntramuscular injection
PF-07915048 Influenza saRNABIOLOGICALIntramuscular injection
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Eligibility Criteria

Age Range18 Years to 49 Years
SexALL
Healthy VolunteersYes
Study Sites24

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,...

Countries:United States
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Frequently asked questions about PF-07852352 Influenza saRNA 1

What is PF-07852352 Influenza saRNA 1 used for?

PF-07852352 Influenza saRNA 1 is an investigational vaccine being studied for the prevention of influenza in humans. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

Who makes PF-07852352 Influenza saRNA 1?

PF-07852352 Influenza saRNA 1 is being developed by Pfizer, Inc., a biopharmaceutical company traded on the New York Stock Exchange under the ticker symbol PFE.

What phase is PF-07852352 Influenza saRNA 1 in?

PF-07852352 Influenza saRNA 1 is in Phase 1 clinical development. It is an investigational vaccine and has not been approved for use. One Phase 1 trial has been completed.

What clinical trials is PF-07852352 Influenza saRNA 1 in?

PF-07852352 Influenza saRNA 1 has been studied in one completed Phase 1 trial, NCT05227001, which enrolled 440 participants in the United States. The trial was randomized, double-blind, and placebo-controlled, and included healthy volunteers aged 18 years and older.

Is PF-07852352 Influenza saRNA 1 the same as a self-amplifying RNA vaccine?

Yes, PF-07852352 Influenza saRNA 1 is a self-amplifying ribonucleic acid (RNA) vaccine. The completed clinical trial NCT05227001 was designed to evaluate this self-amplifying RNA vaccine for the prevention of influenza.