Clinical Trials Logo

Clinical Trial Summary

The purpose of this study is to learn if modified RNA (modRNA) vaccines for the prevention of influenza are: - safe; and - how these vaccines produce an immune response in generally healthy adults. Immune response is the way the body protects itself against things it sees as harmful or foreign. RNA (also called ribonucleic acid) is one of two types of nucleic acid made by cells. RNA contains information that has been copied from DNA (the other type of nucleic acid). Cells make several different forms of RNA, and each form has a specific job in the cell. Many forms of RNA have functions related to making proteins. RNA is also the genetic material of some viruses instead of DNA. RNA can be made in the laboratory and used in research studies. Also called ribonucleic acid. Influenza is term used for flu illness. It is an infection caused by a virus that affects your mouth, nose, and throat. The study is seeking for participants who: - are at least 18 years of age - have not received an influenza vaccine within the last 6 months - are generally healthy This study will be divided into three sub-studies: Substudy A (SSA), Substudy B (SSB), and Substudy C (SSC). All participants, regardless of sub-study, will receive 1 dose of either of the following vaccines as an injection into their arm: - 1 of the modRNA influenza vaccines that is being studied; or - an approved influenza vaccine approved for use in their respective age group. Participants will be involved in this study for about 6 months. During this time, participants will have at least 3 clinic visits.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT06436703
Study type Interventional
Source Pfizer
Contact Pfizer CT.gov Call Center
Phone 1-800-718-1021
Email ClinicalTrials.gov_Inquiries@pfizer.com
Status Recruiting
Phase Phase 1/Phase 2
Start date May 24, 2024
Completion date February 5, 2025

See also
  Status Clinical Trial Phase
Completed NCT03275389 - A Study to Evaluate the Reactogenicity, Safety and Immunogenicity of GlaxoSmithKline (GSK) Biologicals' Investigational Supra-seasonal Universal Influenza Vaccines - Inactivated (SUIVs) (GSK3816302A) in Healthy Adults Aged 18 to 39 Years Phase 1
Completed NCT03442582 - Afluria Pregnancy Registry
Completed NCT05981846 - A Phase II Trial to Evaluate the Safety and Immunogenicity of BIMERVAX® When Coadministered With Seasonal Influenza Vaccine (SIIV) in Adults Older Than 65 Years of Age Fully Vaccinated Against COVID-19 Phase 2
Completed NCT05044195 - A Clinical Study to Evaluate the Immunogenicity and Safety of an Adjuvanted Quadrivalent Influenza Vaccine Compared With a Licensed Quadrivalent Vaccine in Adults 50 to 64 Years of Age Phase 3
Completed NCT02914275 - A Study to Evaluate the Immunogenicity and Safety of Seqirus Quadrivalent Influenza Vaccine (QIV) in a Pediatric Population 6 Months Through 59 Months of Age. Phase 3
Completed NCT04590066 - Testing Multiple Behavioral Science Strategies to Increase Flu-Shot Rates at a Large Retail Pharmacy N/A
Recruiting NCT03778203 - Development of Childhood Anti-influenza Immunity Phase 4
Completed NCT04527614 - Influence of Prior Infection With COVID-19 on Occurrence of Influenza-like Illness or Acute Respiratory Infection N/A
Terminated NCT03658629 - Phase 2 Dose and Formulation Confirmation of Quad-NIV in Older Adults Phase 2
Completed NCT05269290 - Efficacy and Safety of Ingavirin®, Syrup, 30 mg/5 ml, in Children With Influenza and Other Acute Respiratory Viral Infections Phase 3
Completed NCT06385821 - A Study to Prove Non-inferior Immunogenicity of Grippol Quadrivalent Compared to Grippol Plus Phase 3
Completed NCT02984280 - Specific Respiratory Infections as Triggers of Acute Medical Events N/A
Withdrawn NCT02883972 - Childhood Influenza Immunisation Invitation Trial in Schools N/A
Completed NCT02867358 - A Clinical Trial of KT07 Capsule in the U.S.A Phase 2
Completed NCT02998996 - Study to Assess the Safety, Tolerability and Immune Response Following Vaccination With Immunose™ FLU Phase 1/Phase 2
Completed NCT02545543 - A Study to Evaluate the Immunogenicity and Safety of Seqirus Quadrivalent Influenza Vaccine (QIV) in a Pediatric Population 5 Through 17 Years of Age Phase 3
Completed NCT02212106 - A Study to Evaluate the Safety and Tolerability of Trivalent Influenza Virus Vaccine in Children Aged 5 Years to < 9 Years Phase 4
Completed NCT02243774 - Mail Outreach To Increase Vaccination Acceptance Through Engagement N/A
Completed NCT02621164 - Immunogenicity and Safety of Quadrivalent Influenza Vaccine in Children and Adolescents Phase 3
Completed NCT02344134 - Study of Egg-derived Influenza Vaccine and Cell Culture-derived Influenza Vaccine in Adult and Elderly Subjects Phase 3