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CME / CE

Are COVID-19 Vaccines Safe for Children Younger Than 5 Years?

  • Authors: News Author: Brittany Vargas CME Author: Charles P. Vega, MD
  • CME / CE Released: 7/28/2023
  • Valid for credit through: 7/28/2024, 11:59 PM EST
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  • Credits Available

    Physicians - maximum of 0.25 AMA PRA Category 1 Credit(s)™

    Nurses - 0.25 ANCC Contact Hour(s) (0 contact hours are in the area of pharmacology)

    Pharmacists - 0.25 Knowledge-based ACPE (0.025 CEUs)

    Physician Assistant - 0.25 AAPA hour(s) of Category I credit

    IPCE - 0.25 Interprofessional Continuing Education (IPCE) credit

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Target Audience and Goal Statement

This activity is intended for primary care clinicians, pediatricians, nurses, pharmacists, nurse practitioners and other clinicians who treat and manage young children.

The goal of this activity is for members of the healthcare team to be better able to analyze the safety of mRNA-based COVID-19 vaccines among young children < 5 years.

Upon completion of this activity, participants will:

  • Distinguish guidelines for the application of COVID-19 vaccines among young children
  • Analyze the safety of mRNA-based COVID-19 vaccines among young children
  • Outline implications for the healthcare team


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News Author

  • Brittany Vargas

    Freelance writer, Medscape

    Disclosures

    Brittany Vargas has no relevant financial relationships.

CME Author

  • Charles P. Vega, MD

    Health Sciences Clinical Professor of Family Medicine
    University of California, Irvine School of Medicine

    Disclosures

    Charles P. Vega, MD, has the following relevant financial relationships:
    Consultant or advisor for: Boehringer Ingelheim Pharmaceuticals, inc.; GlaxoSmithKline; Johnson & Johnson Pharmaceutical Research & Development, L.L.C. 

Editor/Nurse Planner

  • Stephanie Corder, ND, RN, CHCP

    Associate Director, Accreditation and Compliance, Medscape, LLC

    Disclosures

    Stephanie Corder, ND, RN, CHCP, has no relevant financial relationships.

Compliance Reviewer

  • Amanda Jett, PharmD, BCACP

    Associate Director, Accreditation and Compliance, Medscape, LLC

    Disclosures

    Amanda Jett, PharmD, BCACP, has no relevant financial relationships.

Peer Reviewer

This activity has been peer reviewed and the reviewer has no relevant financial relationships.


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CME / CE

Are COVID-19 Vaccines Safe for Children Younger Than 5 Years?

Authors: News Author: Brittany Vargas CME Author: Charles P. Vega, MDFaculty and Disclosures

CME / CE Released: 7/28/2023

Valid for credit through: 7/28/2024, 11:59 PM EST

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Note: The information on the coronavirus outbreak is continually evolving. The content within this activity serves as a historical reference to the information that was available at the time of this publication. We continue to add to the collection of activities on this subject as new information becomes available. It is the policy of Medscape Education to avoid the mention of brand names or specific manufacturers in accredited educational activities. However, manufacturer names related to the approved COVID-19 vaccines are provided in this activity in an effort to promote clarity. The use of manufacturer names should not be viewed as an endorsement by Medscape of any specific product or manufacturer.

Clinical Context

The latest guidelines from the Centers for Disease Control and Prevention (CDC) call for the application of COVID-19 vaccine for all individuals older than 6 months. The vaccine series for children aged between 6 months and 4 years should consist of 2 vaccine doses of the Moderna vaccine or a series of 3 doses of the Pfizer/BioNTech vaccine. The bivalent vaccines can be used for the primary series across all ages. The recommendations also call for a bivalent booster dose at least 8 weeks after the receipt of a monovalent vaccine.

However, despite these recommendations, COVID-19 vaccination rates are lowest for children younger than 5 years when compared with those of other age groups.

One limiting factor regarding application of the COVID-19 vaccine among young children is concern regarding the safety of the vaccine. The current study addresses this issue by using a large vaccine database.

Study Synopsis and Perspective

TOPLINE:

COVID-19 vaccines from Moderna and Pfizer-BioNTech are safe for children younger than 5 years, according to findings from a study funded by the CDC.

METHODOLOGY:

The current study employed a rapid cycle analysis (RCA) to report safety surveillance in children under 5 years of age. Data came from the Vaccine Safety Datalink (VSD), which is a collaboration between the CDC and 8 health systems in the United States. Data was extracted from participating sites using sequential analysis to evaluate prespecified outcome indicators including myocarditis, pericarditis, and seizures. Outcomes were compared between those receiving a primary vaccination at 1-21 days postvaccination to comparators at 22-42 days postvaccination (control). Data from 135,005 doses given to children aged 4 years and younger who received the Pfizer-BioNTech mRNA vaccine, and 112,006 doses given to children aged 5 years and younger who received the Moderna version. 

TAKEAWAY:

None of the prespecified outcome indicators, including myocarditis or pericarditis, was detected among the children in the 21 days after receipt of either vaccine. It was noted that one case of hemorrhagic stroke and one case of pulmonary embolism occurred after vaccination, but these were linked to preexisting congenital abnormalities. Descriptive analysis revealed that one case of anaphylaxis was found and associated with a food allergy and thus, unrelated to the vaccine. One case of multisystem inflammatory syndrome in children (MIS-C) was identified in the postvaccination period but the child acquired COVID-19 after the infection and before the diagnosis of MIS-C.

IN PRACTICE:

These results are consistent with other vaccine safety monitoring systems and phase 3 clinical trials. The data revealed in this study “can provide reassurance to clinicians, parents, and policymakers alike,” the authors write.

STRENGTHS AND LIMITATIONS:

The study included a large, diverse population with routine data analysis and a robust data capture. Limitations included a low statistical power for early analysis, especially for rare outcomes. In addition, fewer than 25% of children in the database had received a vaccine at the time of analysis.

STUDY DETAILS:

The study was led by Kristin Goddard, MPH, a researcher at the Kaiser Permanente Vaccine Study Center in Oakland, California, and was funded by the CDC.

DISCLOSURES:

Donahue reports receiving funding from Janssen Vaccines and Prevention for a study unrelated to COVID-19 vaccines. One coauthor reports receiving grants from Pfizer in 2019 for clinical trials for coronavirus vaccines and from Merck, GSK, and Sanofi Pasteur for unrelated research.

Pediatrics. Published online June 6, 2023.[1]

Study Highlights

  • Researchers used the Vaccine Safety Datalink to answer their study question. This system is a collaboration between the CDC and 8 large US health systems and includes data on approximately 550,000 children younger than 5 years.
  • The study compared adverse event rates among children between the ages of 6 months and 5 years who had received the COVID-19 vaccine. The main analysis focused on the rate of events during days 1 to 21 postvaccination (“risk interval”) with the period 22 to 42 days postvaccination (“control interval”).
  • Study outcomes were adjusted to account for age, sex, study site, calendar day, and race.
  • The adverse events assessed included appendicitis, Bell’s palsy, encephalitis or myelitis, Guillain-Barre syndrome, immune thrombocytopenia, Kawasaki disease, pulmonary embolism, seizures, hemorrhagic stroke, transverse myelitis, myocarditis/pericarditis, and venous thromboembolism.
  • From June 2022 to March 2023, there were 135,005 doses of Pfizer-BioNTech vaccine given to children between 6 months and 4 years of age, and 112,006 doses of Moderna vaccine were provided to children between 6 months and 5 years of age.
  • Just 24.7% of eligible children in the health systems received a COVID-19 vaccine.
  • The study was nearly equally divided among females and males; 14% of children were younger than 1 year, and the study cohort was diverse in terms of race/ethnicity.
  • There were no events reported for 8 outcomes, including myocarditis/pericarditis, during the risk interval.
  • There was no significant difference for any adverse outcome in comparing the risk and control intervals, regardless of vaccine type.
  • By far the most common adverse event noted overall was seizures. The rate ratio for seizures in comparing the risk and control intervals after receipt of the Pfizer-BioNTech vaccine was 0.64 (95% CI, 0.25-1.51). The respective rate ratio for the Moderna vaccine was 0.85 (95% CI, 0.27-2.32).
  • There was 1 case of hemorrhagic stroke and 1 case of pulmonary embolism recorded, but these events were judged to be unrelated to vaccination.
  • There was 1 case of anaphylaxis after vaccination, although this was judged to be related to a food allergy.
  • There was also a case of multisystem inflammatory syndrome recorded after vaccination, but this case was judged to be a result of COVID-19 infection itself.

Clinical Implications

  • The CDC recommends that the COVID-19 vaccine series for children between 6 months and 4 years of age should consist of 2 vaccine doses of the Moderna vaccine or a series of 3 doses of the Pfizer/BioNTech vaccine. The bivalent vaccines can be used for the primary series across all ages. The recommendations also call for a bivalent booster dose at least 8 weeks after the receipt of a monovalent vaccine.
  • The current study that failed to find any significant adverse event associated with either the Moderna or Pfizer-BioNTech vaccine among children younger than 5 years
  • When educating caregivers concerned about the safety of COVID-19 vaccines for their children, clinicians should include information from the current study when engaging in shared-decision making discussions.
 

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