Related Experiment Video

Updated: Oct 6, 2025

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic
09:03

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic

Published on: November 7, 2020

5.0K

Delay in childhood vaccinations during the COVID-19 pandemic

Da In Diane Lee1,2, Shelley Vanderhout1,3, Mary Aglipay1,2

  • 1Department of Paediatrics, St. Michael's Hospital, 61 Queen Street East, 2nd Floor, Toronto, ON, M5C 2T2, Canada.

Canadian Journal of Public Health = Revue Canadienne De Sante Publique
|January 21, 2022
PubMed

Insights

Routine childhood vaccinations significantly decreased during the COVID-19 pandemic in Ontario, Canada. This delay in essential immunizations raises concerns about potential increases in vaccine-preventable diseases.

Area of Science:

  • Pediatrics
  • Public Health
  • Epidemiology

Background:

  • The COVID-19 pandemic led to widespread reductions in routine medical care.
  • Assessing the impact on essential childhood immunizations is crucial for public health surveillance.

Purpose of the Study:

  • To evaluate the frequency of on-time routine childhood vaccinations for children aged 0-2 years in Ontario, Canada.
  • To compare vaccination rates before and after the COVID-19 declaration of emergency on March 17, 2020.

Main Methods:

  • A longitudinal cohort study of 1277 children aged 0-2 years in Toronto, Canada.
  • Logistic mixed effects regression and Cox proportional hazards models were used to analyze vaccination timing.
  • Vaccination status was compared before and after the COVID-19 declaration of emergency.

Main Results:

  • The proportion of on-time vaccinations dropped from 81.8% before the pandemic to 62.1% after (p < 0.001).
  • The odds of delayed vaccination increased by 3.77 times (95% CI: 2.86-4.96).
  • Median vaccination delay increased from 5 days to 17 days.

Conclusions:

  • Routine childhood vaccination rates were significantly lower during the initial phase of the COVID-19 pandemic.
  • Prolonged delays in childhood immunizations may increase the risk of vaccine-preventable diseases.
Abstract

Keywords:
COVID-19ImmunizationImmunization scheduleVaccination coverageVaccinations

More Related Videos

Experimental Paradigm for Measuring the Effects of Self-distancing in Young Children07:01

Experimental Paradigm for Measuring the Effects of Self-distancing in Young Children

Published on: March 1, 2019

8.1K
Induction and Monitoring of Adoptive Delayed-Type Hypersensitivity in Rats22:06

Induction and Monitoring of Adoptive Delayed-Type Hypersensitivity in Rats

Published on: October 1, 2007

12.1K

Related Concept Videos

Vaccinations01:51

Vaccinations

Overview
45.6K
Drug Dosing: Infants and Children01:29

Drug Dosing: Infants and Children

Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
21
Pharmacokinetics in Pediatric Patients: Drug Excretion01:26

Pharmacokinetics in Pediatric Patients: Drug Excretion

In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
11
Development of Immunocompetence01:22

Development of Immunocompetence

The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
485
Preventive Healthcare Services01:30

Preventive Healthcare Services

Preventive healthcare services keep people healthy via frequent check-ups, screening, and counseling. They primarily aid in disease prevention rather than treating an acute or chronic illness. Preventive treatment also keeps individuals productive and energetic, allowing them to work well into their retirement years. Examples of preventive care services include:
1.2K
Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
1.2K