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Moderna TX

A Phase 2/3, Randomized, Observer-Blind, Placebo-Controlled, Study to Evaluate the Safety, Reactogenicity, and Effectiveness of mRNA-1273 SARS-CoV-2 Vaccine in Healthy Adolescents 12 to < 18 years of age

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
PACTR
Registry ID
PACTR202212801139469
Enrollment
500
Registered
2022-12-13
Start date
2023-08-01
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Respiratory

Interventions

mRNA1273
Placebo group

Sponsors

Moderna TX Inc
Lead Sponsor

Eligibility

Sex/Gender
Female

Inclusion criteria

Inclusion criteria: Inclusion Criteria: 1. Participants must have been previously enrolled in the mRNA-1273-P203 study, are actively participating in Part 1A or Part 1B, and are at least 5 months from the last dose. 2. Female participants of childbearing potential may be enrolled in the study if the participant has a negative pregnancy test on the day of the first injection (BD-Day 1).

Exclusion criteria

Exclusion criteria: Pregnant or breastfeeding. Is acutely ill or febrile 24 hours prior to or at the Screening Visit (Day 0). Fever is defined as a body temperature = 38.0°C/= 100.4°F. Participants who meet this criterion may have visits rescheduled within the relevant study visit windows. Afebrile participants with minor illnesses can be enrolled at the discretion of the investigator. Has a medical, psychiatric, or occupational condition that may pose additional risk as a result of participation, or that could interfere with safety assessments or interpretation of results according to the investigator’s judgment. History of a diagnosis or condition (after enrollment in Part 1A) that, in the judgment of the investigator, may affect study endpoint assessment or compromise participant safety: • Suspected active hepatitis • Has a bleeding disorder that is considered a contraindication to IM injection or phlebotomy

Design outcomes

Primary

MeasureTime frame
To evaluate the safety and reactogenicity of 100 ?g mRNA-1273 vaccine administered in 2 doses 28 days apart

Secondary

MeasureTime frame
To evaluate the persistence of the immune response of mRNA-1273 vaccine (100 ?g) administered in 2 doses 28 days apart, as assessed by the level of SARS-CoV-2 S2P-specific bAb through 1 year after Dose 2

Countries

Kenya

Contacts

Public ContactDr. Videlis Nduba

Principal Investigator

vnduba@gmail.com+254722205901

Outcome results

None listed

Source: PACTR (via WHO ICTRP) · Data processed: Aug 9, 2026