A Study to Learn About The COVID-19 (Study) Vaccine (Called COMIRNATY) in People That Are Less Than 21 Years Old.
← catalyst calendarNCT05295290 · readout in 956 d
Sponsored by Pfizer (industry) · PFE — their whole pipeline →. With Carelon Research, National Heart, Lung, and Blood Institute (NHLBI).
Phase
Phase 4
Status
Active, not recruiting
Study type
Interventional
Design
Non randomized · None · Other
Enrollment
319actual
Sites
18
Country
United States
Every value on this page is a field the sponsor filed with ClinicalTrials.gov, reproduced. Dates are their own estimates, revised as a study runs, unless the registry marks them actual. sources →
Source: ClinicalTrials.gov, retrieved 2026-08-19
Dates
each axis at the precision it was filed, with the registry's own basis| Date | Filed | Basis | What it is |
|---|---|---|---|
| Start | 2022-11-21 | actual | When the study began enrolling |
| Primary completion | 2029-04-02 | estimated | The date the last participant is measured for the primary outcome — the readout window |
| Study completion | 2029-04-02 | estimated | The whole study's end, after follow-up |
| First posted | 2022-03-25 | actual | When this record first appeared on the registry |
| Results posted | — | When the sponsor posted results to the registry | |
| Record updated | 2026-05-07 | actual | The sponsor's own last edit to this record — every projection above is as current as this date |
What it studies
Condition
- Myocarditis
Intervention
- Diagnostic test: Cardiac Imaging
Primary outcomes
what the primary-completion date above is the date OFComposite findings of myocarditis
measured 6 months after illness onset
Left ventricular ejection fraction (LVEF) < 55% by echocardiography
measured Up to 5 years following illness onset.
Myocarditis by original or revised Lake Louise criteria on cMRI
measured Up to 5 years following illness onset.
Arrhythmias on cardiac recording (ECG, ambulatory monitoring)
measured Up to 5 years following illness onset.
Complications, including non-cardiac morbidities by medical history
measured Up to 5 years following illness onset.
Functional Status by Behavior Assessment System for Children, Third Edition BASC-3 or PROMIS Short Forms
measured Up to 5 years following illness onset.
The Pediatric Quality of Life Inventory (PEDS QL)
measured Up to 5 years following illness onset.
The Quality of Life Scale (QOLS)
measured Up to 5 years following illness onset.
Conduction system disturbances on cardiac recording (ECG, ambulatory monitoring)
measured Up to 5 years following illness onset.
Permalink · PFE's whole pipeline · Catalyst calendar · Every registered study · What changed