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Overview of the Moderna Pediatric COVID-19 Vaccine Study

Rady Children's Health Network is partnering with the Altman Clinical and Translational Research Institute and the Mother-Child-Adolescent Program at UC San Diego to study the safety and effectiveness of Moderna's COVID-19 vaccine for children. Clinical trials will be conducted at Rady Children's Hospital-San Diego and the Altman Clinical and Translational Research Institute at UCSD. 

Moderna Pediatric COVID-19 Vaccine Study Survey

Who We Are

Rady Children's Hospital-San Diego is a 505-bed pediatric care facility providing the largest source of comprehensive pediatric medical services in San Diego, southern Riverside and Imperial counties. Rady Children's is the only health system in the San Diego area dedicated exclusively to pediatric healthcare and is the region's only designated pediatric trauma center. In June 2020, U.S. News & World Report ranked Rady Children's among the best children's hospitals in the nation in all ten pediatric specialties the magazine surveyed. Rady Children's is a nonprofit organization that relies on donations to support its mission. For more information, visit and find us on FacebookTwitter and Vimeo.

The UCSD MCAP provides comprehensive, family centered care of women, children, youth and families. This internationally recognized multidisciplinary specialist provides medical care, clinical research trials, patient education, counseling, case management, peer advocacy, and community education. Its team of investigators is highly experienced in vaccine clinical trials with an emphasis on the prevention of respiratory viral diseases including COVID-19.

Our Mission

To Conduct Phase 2 and Phase 3 Efficacy Trials to prevent infection and COVID-19 disease.

Study Description

Protocol Title: A Phase 2/3, Two-Part, Open-Label, Dose Escalation, Age De-escalation and Randomized, Observer-Blind, Placebo-Controlled Expansion Study to Evaluate the Safety, Tolerability, Reactogenicity, and Effectiveness of mRNA-1273 SARS-CoV-2 Vaccine in Healthy Children 6 months to < 12 Years of Age

Study Populations

  • 6 years to < 12  years
  • 2 years to < 6 years
  • 6 months to < 2 years

The study will be conducted in 2 Parts

  • Part 1: open label, dose determining; n= 750 (150 6 years to <12 years; 150 2 years to <6 years; and 450 6 months to <2 years) )
  • Part 2:  is blinded; n=6000 (2,000 in each age group), 3:1 (mRNA 1273 vaccine:placebo) randomization (mRNA 1273 dose used per cohort in Part 2 is determined by Part 1)

Note: All children at the end of the study will receive the optimal vaccine for age

Study Duration

14 months

Children to be included in the study are

  • Male or female, 6 months to < 12 years of age at the time of consent and in good health. based on review of medical history and screening physical examination. 
  • Children with chronic conditions (eg, overweight, asthma, diabetes, cystic fibrosis, HIV) in stable will be eligible for inclusion. 
  • Parent/legal guardian agrees to have child participate and provides written informed consent.
  • Children 6 months to <2 years born at >37 weeks with a minimum weight of 2.5 kilograms
  • Children with immunosuppressive conditions or receiving immunosuppressive medications will not be eligible to participate in the study

What Study Volunteers Can Expect

Before joining:

  • When a potential parent/legal guardian contacts us, they will be provided information about the research study.
  • Parent/legal guardian of a potential participant will be asked personal questions about their child before coming into the study clinic to help determine their potential for study eligibility. Determining eligibility can include things like asking about their medical history and doing a physical exam. 
  • You will be provided information about the study to enable people to make an informed decision about whether or not to have their child join the study. Specific details about the study will be provided during the informed consent process.

During the study:

  • The study will require coming into the study clinic for 7 or more visits over 1-2 years.
  • The study will involve your child getting 2 injections of vaccine or placebo and having blood drawn at some visits.
  • Parent/Legal guardian of participants will be asked to keep track of how their child is feeling using an online diary for about a week following each injection.
  • Study participants are compensated for their time, travel, and inconvenience while enrolled in the study. 

After the study:

  • We may ask if we can contact participants again for another study
  • When the study is complete, the results will be disseminated to all families and their communities without any identifying information

If you may be interested in enrolling your child(ren) into this study and would like to receive additional information, please complete the brief survey below.