Moderna Announces First Participants Dosed in Phase 2/3 Study of COVID-19 Vaccine Candidate in Pediatric Population

Moderna Announces First Participants Dosed in Phase 2/3 Study of COVID-19 Vaccine Candidate in Pediatric Population

Moderna Inc. (Nasdaq: MRNA), a biotechnology company pioneering messenger RNA (mRNA) therapeutics and vaccines, today announced that the first participants have been dosed in the Phase 2/3 study, called the KidCOVE study, of mRNA-1273, the Company’s vaccine candidate against COVID-19, in children ages 6 months to less than 12 years. The study is being conducted in collaboration with the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health (NIH) and the Biomedical Advanced Research and Development Authority (BARDA), part of the Office of the Assistant Secretary for Preparedness and Response at the U.S. Department of Health and Human Services.

“We are pleased to begin this Phase 2/3 study of mRNA-1273 in healthy children in the U.S. and Canada and we thank NIAID and BARDA for their collaboration,” said Stéphane Bancel, Chief Executive Officer of Moderna. “It is humbling to know that 53 million doses have been administered to people in the U.S. We are encouraged by the primary analysis of the Phase 3 COVE study of mRNA-1273 in adults ages 18 and above and this pediatric study will help us assess the potential safety and immunogenicity of our COVID-19 vaccine candidate in this important younger age population.”

This Phase 2/3 two-part, open-label, dose-escalation, age de-escalation (Part 1) and randomized, observer-blind, placebo-controlled expansion study (Part 2) will evaluate the safety, tolerability, reactogenicity, and effectiveness of two doses of mRNA-1273 given 28 days apart. The Company intends to enroll approximately 6,750 pediatric participants in the U.S. and Canada ages 6 months to less than 12 years.

In Part 1, each participant ages two years to less than 12 years may receive one of two dose levels (50 μg or 100 μg). Also in Part 1, each participant ages six months to less than 2 years may receive one of three dose levels (25 μg, 50 μg and 100 μg). An interim analysis will be conducted to determine which dose will be used in Part 2, the placebo-controlled expansion portion of the study. Participants will be followed through 12 months after the second vaccination.

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