Clinical Trials Logo

Clinical Trial Summary

The purpose of this clinical trial is to learn about the safety, extent of the side effects, and immune responses of the study vaccine (called variant-adapted BNT162b2 RNA-based vaccine) in healthy children. The trial is divided into 5 individual studies or substudies based on age group and prior history of COVID-19 vaccinations. All participants in each of the 5 sub-studies will receive study vaccine as a shot depending on what group they are in. - Substudy A design: Phase 1 includes participants 6 months through less than 4 years 3 months of age who have not received a previous coronavirus vaccination (COVID-19 vaccine naïve) and will receive 3 doses of study vaccine as their initial series, followed by a fourth dose of study vaccine. Phase 2/3 includes participants 6 months through less than 5 years of age who have not received a previous coronavirus vaccination (COVID-19 vaccine naive) and will receive 1, 2, or 3 doses of study vaccine, depending on what group they are in. - Substudy B design: includes participants 6 months through less than 5 years of age who have either received 2 or 3 prior doses of BNT162b2 and will receive study vaccine as their third or fourth dose. - Substudy C design: Phase 1 includes participants 6 months through less than 5 years of age who have received 3 prior doses of BNT162b2 and will receive study vaccine as their fourth dose. - Substudy D design: includes participants 5 through less than12 years of age who have received 2 or 3 prior doses of BNT162b2 and will receive study vaccine as their third or fourth dose. - Substudy E design: includes participants 2 through less than 12 years of age who have not received a previous coronavirus vaccination (COVID-19 vaccine naive) and will receive a single dose of study vaccine.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT05543616
Study type Interventional
Source BioNTech SE
Contact Pfizer CT.gov Call Center
Phone 1-800-718-1021
Email ClinicalTrials.gov_Inquiries@pfizer.com
Status Recruiting
Phase Phase 2/Phase 3
Start date September 23, 2022
Completion date August 11, 2025

See also
  Status Clinical Trial Phase
Withdrawn NCT06065033 - Exercise Interventions in Post-acute Sequelae of Covid-19 N/A
Completed NCT06267534 - Mindfulness-based Mobile Applications Program N/A
Completed NCT05047601 - A Study of a Potential Oral Treatment to Prevent COVID-19 in Adults Who Are Exposed to Household Member(s) With a Confirmed Symptomatic COVID-19 Infection Phase 2/Phase 3
Recruiting NCT04481633 - Efficacy of Pre-exposure Treatment With Hydroxy-Chloroquine on the Risk and Severity of COVID-19 Infection N/A
Recruiting NCT05323760 - Functional Capacity in Patients Post Mild COVID-19 N/A
Completed NCT04612972 - Efficacy, Safety and Immunogenicity of Inactivated SARS-CoV-2 Vaccines (Vero Cell) to Prevent COVID-19 in Healthy Adult Population In Peru Healthy Adult Population In Peru Phase 3
Completed NCT04537949 - A Trial Investigating the Safety and Effects of One BNT162 Vaccine Against COVID-19 in Healthy Adults Phase 1/Phase 2
Recruiting NCT05494424 - Cognitive Rehabilitation in Post-COVID-19 Condition N/A
Active, not recruiting NCT06039449 - A Study to Investigate the Prevention of COVID-19 withVYD222 in Adults With Immune Compromise and in Participants Aged 12 Years or Older Who Are at Risk of Exposure to SARS-CoV-2 Phase 3
Enrolling by invitation NCT05589376 - You and Me Healthy
Completed NCT05158816 - Extracorporal Membrane Oxygenation for Critically Ill Patients With COVID-19
Recruiting NCT04341506 - Non-contact ECG Sensor System for COVID19
Completed NCT04512079 - FREEDOM COVID-19 Anticoagulation Strategy Phase 4
Completed NCT04384445 - Zofin (Organicell Flow) for Patients With COVID-19 Phase 1/Phase 2
Completed NCT05975060 - A Study to Evaluate the Safety and Immunogenicity of an (Omicron Subvariant) COVID-19 Vaccine Booster Dose in Previously Vaccinated Participants and Unvaccinated Participants. Phase 2/Phase 3
Active, not recruiting NCT05542862 - Booster Study of SpikoGen COVID-19 Vaccine Phase 3
Terminated NCT05487040 - A Study to Measure the Amount of Study Medicine in Blood in Adult Participants With COVID-19 and Severe Kidney Disease Phase 1
Withdrawn NCT05621967 - Phonation Therapy to Improve Symptoms and Lung Physiology in Patients Referred for Pulmonary Rehabilitation N/A
Terminated NCT04498273 - COVID-19 Positive Outpatient Thrombosis Prevention in Adults Aged 40-80 Phase 3
Active, not recruiting NCT06033560 - The Effect of Non-invasive Respiratory Support on Outcome and Its Risks in Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-COV-2)-Related Hypoxemic Respiratory Failure