This In Brief was accepted July, 2021. Due to the Pediatrics in Review process from authorship to publication and the rapidly evolving nature of the COVID-19 pandemic, this In Brief may not reflect the most recent events.Severe acute respiratory syndrome coronavirus 2 has infected hundreds of millions of individuals globally, and millions have died as a result of the associated coronavirus disease 2019 (COVID-19). Although severe COVID-19 disease has predominantly affected older adults, children have also been affected. As of early May 2021, nearly 4 million total cases of COVID-19 were reported in children, representing 14% of all cases. With wider availability and uptake of vaccination by adults, increased rates of infection are being reported in the unvaccinated pediatric population. New COVID-19 variants, loosening of public health measures, and lifting of restrictions on school activities are also driving increased infections in children. Serious illness and death are lower in children; however, after symptomatic or asymptomatic infection, they are vulnerable to multisystem inflammatory syndrome in children (MIS-C). This postinfectious, immune-mediated syndrome can lead to serious, life-threatening illness in otherwise healthy children. Children can also experience post–COVID-19 syndrome or long COVID-19 and suffer from persistent symptoms at the postviral stage of the disease. The COVID-19 pandemic has disrupted children’s education and recreational activities and has had a substantial effect on children’s physical, mental, and emotional health.Data suggest that vaccines are highly effective in preventing severe COVID-19, act against many new variants, and are incredibly safe. The Pfizer-BioNTech (mRNA) COVID-19 vaccine was initially authorized for those 16 years and older and the Moderna (mRNA) and Johnson and Johnson (adenovirus-vectored) vaccinations for those 18 years and older. Recently the Food and Drug Administration (FDA) provided Emergency Use Authorization for adolescents 12 to 15 years old to receive the Pfizer-BioNTech vaccination after promising clinical trial results. The Centers for Disease Control and Prevention’s (CDC) Advisory Committee on Immunization Practices has also recommended its use in adolescents. The Pfizer-BioNTech trial enrolled 2,260 participants, and the vaccine was 100% effective in preventing symptomatic infection in those 12 to 15 years old. The vaccine also exhibited appropriate immunogenicity and mostly mild to moderate reactogenicity symptoms. All the children were from the United States, and most identified as white (85.9%) and non-Hispanic/Latino (88.2%). The dose of the Pfizer-BioNTech vaccination in 12- to 17-years-olds is the same as that in adults. Moderna completed a clinical trial (TeenCOVE) of 12- to younger than 18-year-olds with encouraging results. TeenCOVE enrolled more than 3,700 participants in the United States with zero infections in fully vaccinated adolescents. In addition, the vaccine was highly effective (93%) 14 days after the first dose, and the safety and tolerability profile was similar in adolescents and adults. Emergency Use Authorization for the Moderna vaccine for adolescents is expected in early summer 2021.Pfizer-BioNTech and Moderna are currently conducting phase I clinical trials in children aged 6 months to younger than 12 years. Once age-specific doses are selected, larger clinical trials will be conducted this summer. Determining appropriate dosing is an important consideration as vaccination expands to younger children. Both the Moderna and Pfizer-BioNTech clinical trials in children are being performed as age de-escalation/dose escalation studies. It is probable that a smaller dose will produce adequate immune response, and the recommended doses may be different by age group. The results from these studies are anticipated in the second half of 2021, and if safety and immunogenicity are confirmed, authorization for vaccination of younger children could occur in late 2021 or early 2022.Although allergic reactions to vaccine ingredients are rare, children who have a history of severe allergic reaction to any ingredient in the vaccination should not get a COVID-19 vaccine. Children who have severe allergies to other entities should plan for a slightly longer observation after vaccination. The CDC allows vaccination of children with a history of MIS-C, although currently there are no data on the safety or efficacy in this population. The mechanism of the hyperinflammatory immune response in MIS-C is unclear, and the risk of recurrence after vaccination is unknown.Adolescents and older children had similar local reactogenicity as adults in the Pfizer-BioNTech clinical trial. Adolescents reported pain at the injection site more commonly after the second dose. Systemic responses were also similar, with fatigue (60% after dose 1, 66% after dose 2) and headache (55% after dose 1, 64.5% after dose 2) occurring most often. Chills, muscle pain, joint pain, and fever also occurred. Fever was slightly more common in 12- to 15-year-olds compared with adults, with 0.9% of children experiencing temperatures of 102°F to 104°F (38.9°C–40.0°C) and 0.1% of children with temperatures higher than 104°F (>40.0°C). Adverse effects typically lasted 1 to 3 days. Children and adolescents are more likely to have a more robust immune response and thus might experience more adverse effects than their parents or guardians.Survey data from the CDC and the University of Iowa suggest that children and parents feel most comfortable receiving COVID-19 vaccinations at their primary care physicians’ offices. This underscores the importance of ensuring that pediatricians are able to store and administer the vaccines. Recently after a review of data, the FDA authorized that undiluted, thawed Pfizer-BioNTech vaccine vials can be refrigerated for 1 month. Out of an abundance of caution, COVID-19 vaccines were previously recommended to be administered alone and spaced 2 weeks from other vaccinations. The CDC now allows for COVID-19 vaccines and other vaccinations to be given concurrently after evaluation of safety data for COVID-19 vaccines currently authorized by the FDA. It is not known whether the reactogenicity of the COVID-19 vaccine increases with co-administration, particularly with vaccines known to illicit robust immune responses. This is an important issue to consider for childhood vaccination because health supervision visits for routine care and vaccinations are important opportunities for COVID-19 vaccine administration. In addition, many children have had delayed vaccinations during the COVID-19 pandemic and will need catch-up vaccination schedules in addition to receipt of a COVID-19 vaccine.COVID-19 vaccinations are a crucial and promising step to containment of the pandemic. However, many parents are reluctant to vaccinate their children against COVID-19. A recent national survey found that 27% of mothers and 11% of fathers are extremely unlikely to vaccinate their children against COVID-19. Thoughts on vaccination differed based on parents’ education, income, and political party. A Kaiser Family Foundation survey found that parents’ intentions for children’s COVID-19 vaccination largely align with their own vaccination intentions. Pediatricians remain trusted resources for families and essential advocates who can listen to parents’ questions and provide more information regarding COVID-19 vaccination. Many resources are available for providers, including information from the CDC, the American Academy of Pediatrics, and the Children’s Hospital of Philadelphia Vaccine Education Center.Children younger than 15 years account for nearly one-fourth of the global population, remain at risk for both COVID-19 and sequelae of infection, and can spread disease among themselves and to older individuals. Adolescent vaccinations have thus far been highly effective and safe, with further clinical trials underway to expand use to younger children. Ensuring that children are vaccinated against COVID-19 has implications for return to school and activities, quarantine after exposure, and helping children and parents regain a sense of normalcy.Immunization of children and adolescents is an essential strategy in further containing the COVID-19 pandemic. Continued expansion of vaccination includes benefits to the individual who is being vaccinated, his or her family members, the community, and the public health benefits in striving to reach herd immunity. I find it a remarkable accomplishment of science that a safe vaccine has been developed in such a timely manner. Yet, vaccine hesitancy must be addressed in addition to strategies to enhance access of COVID vaccines to all who need them. We, as pediatricians, need to meet with parents and their children/adolescents, listen carefully to their concerns, provide accurate information that is easy to understand in respectful and nonjudgmental ways, answer questions, and promote the trusting relationship we all strive for in our relationships with patients and families. In addition, practices and communities need to continue to find creative strategies to ensure vaccine access to all patients. Although vaccination in the primary care provider’s office is optimal in maintaining the medical home and ensuring that all health-care issues are addressed, the pandemic has allowed us to think creatively in offering vaccine clinics in the community, through churches, sports centers and events, schools, pharmacies, and other locations to maximize the ease in obtaining the vaccine. These strategies, while helping our country and public health system now, will also be resources for future vaccine rollouts and minimizing health disparities.
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