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Children and COVID-19 Research Library

UNICEF Innocenti's curated library of COVID-19 + Children research

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The impact of COVID-19 pandemic on inequity in routine childhood vaccination coverage: a systematic review

AUTHOR(S)
Nicholas Spencer; Wolfgang Markham; Samantha Johnson (et al.)

Published: June 2022   Journal: Vaccines
Routine childhood vaccination coverage rates fell in many countries during the COVID-19 pandemic, but the impact of inequity on coverage is unknown. This study synthesised evidence on inequities in routine childhood vaccination coverage (PROSPERO, CRD 42021257431). Studies reporting empirical data on routine vaccination coverage in children 0–18 years old during the COVID-19 pandemic by equity stratifiers were systematically reviewed. Nine electronic databases were searched between 1 January 2020 and 18 January 2022.
Impact of COVID-19 pandemic on routine vaccination coverage of children and adolescents: a systematic review
Published: February 2022   Journal: Health Science Reports

Scientists and healthcare workers have expressed their concerns on the impacts of the COVID-19 pandemic on vaccination coverage in children and adolescents. Therefore, this study aimed to systematically review the studies addressing this issue worldwide. A systematic search of relevant studies using the keywords was conducted on databases of PubMed, Web of Science, and Cochrane on May 22, 2021. The identified records were imported into EndNote software and underwent a two-phase screening process consisting of title/abstract and full-text screenings against inclusion criteria. The data of the included studies were summarized into a table and the findings were analyzed in a systematic approach.

Medical factors associated with caregiver intention to vaccinate their children against COVID-19

AUTHOR(S)
Thao-Ly T. Phan; Paul T. Enlow; Michael K. Wong (et al.)

Published: February 2022   Journal: Vaccine: X

This paper aims to describe medical factors that are associated with caregiver intention to vaccinate their children against COVID-19. It conducted a cross-sectional study of families receiving primary care in a mid-Atlantic pediatric healthcare system, linking caregiver-reported data from a survey completed March 19 to April 16, 2021 to comprehensive data from the child’s EHR.

Looking ahead: caregivers’ COVID-19 vaccination intention for children 5 years old and younger using the health belief model

AUTHOR(S)
Morgan E. Ellithorpe; Fashina Aladé; Robyn B. Adams (et al.)

Published: February 2022   Journal: Vaccine

COVID-19 vaccine hesitancy is a significant public health issue. While vaccines are not yet available for children, clinical trials are underway, and children will likely be an important factor in the U.S. reaching herd immunity. However, little research has been conducted to examine parents’ intention to vaccinate their young children for COVID-19. An online survey with a national U.S. sample of 682 primary caregivers of children under age six assessed variables associated with intention to accept the COVID-19 vaccine for their children from November 13, 2020, to December 8, 2020.

Impact of the COVID-19 pandemic on pediatric and adolescent vaccinations and well child visits in the United States: a database analysis

AUTHOR(S)
Stephanie A. Kujawski; Lixia Yao; H. Echo Wang (et al.)

Published: January 2022   Journal: Vaccine

The COVID-19 pandemic has disrupted healthcare, including immunization practice and well child visit attendance. Maintaining vaccination coverage is important to prevent disease outbreaks and morbidity. This study assessed the impact of the COVID-19 pandemic on pediatric and adolescent vaccination administration and well child visit attendance in the United States. This cross-sectional study used IBM MarketScan Commercial Database (IMC) with Early View (healthcare claims database) and TriNetX Dataworks Global Network (electronic medical records database) from January 2018–March 2021.

Vaccinating adolescents and children significantly reduces COVID-19 morbidity and mortality across all ages: a population-based modeling study using the UK as an example

AUTHOR(S)
Tinevimbo Shiri; Marc Evans; Carla A. Talarico (et al.)

Published: October 2021   Journal: Vaccines
Debate persists around the risk–benefit balance of vaccinating adolescents and children against COVID-19. Central to this debate is quantifying the contribution of adolescents and children to the transmission of SARS-CoV-2, and the potential impact of vaccinating these age groups. In this study, we present a novel SEIR mathematical disease transmission model that quantifies the impact of different vaccination strategies on population-level SARS-CoV-2 infections and clinical outcomes. The model employs both age- and time-dependent social mixing patterns to capture the impact of changes in restrictions. The model was used to assess the impact of vaccinating adolescents and children on the natural history of the COVID-19 pandemic across all age groups, using the UK as an example. The base case model demonstrates significant increases in COVID-19 disease burden in the UK following a relaxation of restrictions, if vaccines are limited to those ≥18 years and vulnerable adolescents (≥12 years). Including adolescents and children in the vaccination program could reduce overall COVID-related mortality by 57%, and reduce cases of long COVID by 75%. This study demonstrates that vaccinating adolescents and children has the potential to play a vital role in reducing SARS-CoV-2 infections, and subsequent COVID-19 morbidity and mortality, across all ages.
Early exploration of COVID-19 vaccination safety and effectiveness during pregnancy: interim descriptive data from a prospective observational study

AUTHOR(S)
Inna Bleicher; Einav Kadour-Peero; Lena Sagi-Dain (et al.)

Published: October 2021   Journal: Vaccine
During December 2020, a massive vaccination program was introduced in our country. The Pfizer-BioNTech, BNT162b2 vaccine was first offered exclusively to high-risk population, such as medical personnel (including pregnant women). This study compares short term outcomes in vaccinated vs. non-vaccinated pregnant women. In this prospective observational cohort study, vaccinated and non-vaccinated pregnant women were recruited using an online Google forms questionnaire targeting medical groups on Facebook and WhatsApp. A second questionnaire was sent one month after the first one for interim analysis.
SARS-CoV-2 infection risk during delivery of childhood vaccination campaigns: a modelling study

AUTHOR(S)
Simon R. Procter; Kaja Abbas; Stefan Flasche (et al.)

Published: August 2021   Journal: BMC Medicine

The COVID-19 pandemic has disrupted the delivery of immunisation services globally. Many countries have postponed vaccination campaigns out of concern about infection risks to the staff delivering vaccination, the children being vaccinated, and their families. The World Health Organization recommends considering both the benefit of preventive campaigns and the risk of SARS-CoV-2 transmission when making decisions about campaigns during COVID-19 outbreaks, but there has been little quantification of the risks. This study modelled excess SARS-CoV-2 infection risk to vaccinators, vaccinees, and their caregivers resulting from vaccination campaigns delivered during a COVID-19 epidemic. It used population age structure and contact patterns from three exemplar countries (Burkina Faso, Ethiopia, and Brazil). It combined an existing compartmental transmission model of an underlying COVID-19 epidemic with a Reed-Frost model of SARS-CoV-2 infection risk to vaccinators and vaccinees. It explored how excess risk depends on key parameters governing SARS-CoV-2 transmissibility, and aspects of campaign delivery such as campaign duration, number of vaccinations, and effectiveness of personal protective equipment (PPE) and symptomatic screening.

COVID-19 in children and young adults with moderate/severe inborn errors of immunity in a high burden area in pre-vaccine era

AUTHOR(S)
A. Deyà-Martínez; A. García-García; E. A. Gonzalez-Navarro (et al.)

Published: August 2021   Journal: Clinical Immunology

Information regarding inborn error of immunity (IEI) as a risk factor for severe COVID-19 is scarce. This study aimed to determine if paediatric patients with moderate/severe IEI got COVID-19 at the same level as the general population, and to describe COVID-19 expression. It included patients with moderate/severe IEI aged 0–21 years old: cross-sectional study (June2020) to determine the prevalence of COVID-19; prospective study (January2020-January2021) including IEI patients with COVID-19. Assays used: nasopharyngeal swab SARS-CoV-2 PCR and SARS-CoV-2-specific immunoglobulins.

Parental plans to vaccinate children for COVID-19 in New York city

AUTHOR(S)
Chloe A. Teasdale; Luisa N. Borrell; Yanhan Shen (et al.)

Published: July 2021   Journal: Vaccine
Once COVID-19 vaccines are approved for children < 12 years of age, high pediatric vaccination coverage will be needed to help minimize the public health threat from the SARS-CoV-2 epidemic. We conducted an online survey of 1,119 parents and caregivers of children ≤ 12 years in New York City from March 9 to April 11, 2021. Among parents surveyed, 61.9% reported plans to vaccinate their youngest child for COVID-19, 14.8% said they do not plan to vaccinate their child and 23.3% were unsure. Female and non-Hispanic Black parents were least likely to report plans to vaccinate their children. Safety, effectiveness and perceptions that children do not need vaccination were the primary reasons for vaccine hesitancy/resistance. Parents who have or will vaccinate themselves were significantly more likely to report they would vaccinate their children.
A qualitative study exploring the relationship between mothers’ vaccine hesitancy and health beliefs with COVID-19 vaccination intention and prevention during the early pandemic months

AUTHOR(S)
Kimberly K. Walker; Katharine J. Head; Heather Owens (et al.)

Published: June 2021   Journal: Human Vaccines & Immunotherapeutics
Vaccine hesitancy is a top ten global health threat that can negatively impact COVID-19 vaccine uptake. It is assumed that vaccine refusers hold deep, negative beliefs, while acceptors hold strong, positive beliefs. However, vaccine hesitancy exists along a continuum and is multidimensional, varying by time, place, vaccine, subgroup, and person. Guided by the Health Belief Model and vaccine hesitancy frameworks, the study purpose was to qualitatively explore maternal COVID-19 threat perceptions and willingness to accept a COVID-19 vaccine in light of their expressed vaccine hesitancy toward past school required and routinely recommended vaccines and the HPV vaccine for their children. Researchers conducted twenty-five interviews with US Midwestern mothers during the early COVID-19 pandemic months. Mothers were grouped by vaccine hesitancy categories and thematic analysis was used to analyze the data within and across categories.
Parents' willingness to pay for a COVID-19 vaccine for themselves and their children in the United States

AUTHOR(S)
Serkan Catma; Diana Reindl

Published: April 2021   Journal: Human vaccines & immunotherapeutics
Differences in obtaining a vaccine vary based on a multitude of factors including perceptions of vaccine safety, efficacy and willingness to pay (WTP). This study focuses on parent perceptions toward a vaccine for COVID-19 including their WTP decisions for their children and themselves. A mixed methods design using a cross-sectional survey was used to assess the perceptions of US parents, with children under 18, in response to the COVID-19 pandemic. The survey was administered online in November 2020 and 584 final responses were collected.
Missed childhood immunizations during the COVID-19 pandemic in Brazil: analyses of routine statistics and of a national household survey

AUTHOR(S)
Mariangela F. Silveira; Cristian T. Tonial; Ana Goretti K. Maranhão (et al.)

Published: April 2021   Journal: Vaccine

There is widespread concern that disruption to health services during the COVID-19 pandemic has led to declines in immunization coverage among young children, but there is limited information on the magnitude of such impact. High immunization coverage is essential for reducing the risk of vaccine preventable diseases.This study used data from two nationwide sources covering the whole of Brazil. Data from the Information System of the National Immunization Program (SIPNI) on the monthly number of vaccine doses administered to young children were analyzed. The second source was a survey in 133 large cities in the 27 states in the country, carried out from August 24–27. Respondents answered a question on whether children under the age of three years had missed any scheduled vaccinations during the pandemic, and available vaccination cards were photographed for later examination.

SARS-CoV-2 vaccine testing and trials in the pediatric population: biologic, ethical, research, and implementation challenges

AUTHOR(S)
Dan M. Cooper; Behnoush Afghani; Carrie L. Byington

Published: February 2021   Journal: Pediatric Research
As the nation implements SARS-CoV-2 vaccination in adults at an unprecedented scale, it is now essential to focus on the prospect of SARS-CoV-2 vaccinations in pediatric populations. To date, no children younger than 12 years have been enrolled in clinical trials. Key challenges and knowledge gaps that must be addressed include (1) rationale for vaccines in children, (2) possible effects of immune maturation during childhood, (3) ethical concerns, (4) unique needs of children with developmental disorders and chronic conditions, (5) health inequities, and (6) vaccine hesitancy.
Evaluation of COVID-19 vaccine refusal in parents

AUTHOR(S)
Metin Yigit; Aslinur Ozkaya-Parlakay; Emrah Senel

Published: January 2021   Journal: The Pediatric Infectious Disease Journal
The frequency of vaccine refusal, which is associated with many factors, is increasing worldwide. The aim of this study was to predict the frequency of vaccine refusal against domestic and foreign COVID-19 vaccines and identify the factors underlying refusal.
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COVID-19 & Children: Rapid Research Response

UNICEF Innocenti is mobilizing a rapid research response in line with UNICEF’s global response to the COVID-19 crisis. The initiatives we’ve begun will provide the broad range of evidence needed to inform our work to scale up rapid assessment, develop urgent mitigating strategies in programming and advocacy, and preparation of interventions to respond to the medium and longer-term consequences of the COVID-19 crisis. The research projects cover a rapid review of evidence, education analysis, and social and economic policies.