Related Experiment Video
Updated: Oct 17, 2025

Fabrication of Pulsatile Polymeric Microparticles Encapsulating Rabies Antigen
Published on: May 12, 2023
Tracking the impact of the COVID-19 pandemic on routine infant vaccinations in the Dominican Republic
Manuel Colomé-Hidalgo1,2, Juan Donado Campos3, Ángel Gil de Miguel1
1Departamento de Especialidades Médicas y Salud Pública, Universidad Rey Juan Carlos, Madrid, Spain.
Insights
The COVID-19 pandemic severely disrupted vaccination services in the Dominican Republic, leading to significant drops in infant immunization coverage and a rise in unvaccinated infants. Urgent interventions are needed to restore routine vaccination programs and prevent disease outbreaks.
Area of Science:
- Public Health
- Epidemiology
- Global Health
Background:
- COVID-19 pandemic caused widespread disruptions to essential health services, including routine childhood immunizations.
- Millions of infants worldwide remain vulnerable to vaccine-preventable diseases due to interrupted vaccination programs.
Purpose of the Study:
- To analyze the impact of the COVID-19 pandemic on the vaccination program's performance in the Dominican Republic.
- To compare vaccination coverage, dropout rates, and the number of unvaccinated/partially vaccinated infants before and during the pandemic.
Main Methods:
- Ecological study design comparing 2019 (pre-pandemic) and 2020 (pandemic) annual public vaccination coverage data.
- Analysis of trends in vaccine coverage, dropout rates, and number of partially/unvaccinated infants.
- Geographic analysis by COVID-19 incidence and Human Development Index.
Main Results:
- Overall vaccine coverage declined by 10.4%, with pentavalent vaccine (Penta3) coverage dropping from 90.1% to 81.1%.
- The number of partially vaccinated infants increased by 66% (34,185) and unvaccinated infants by 376% (5,593).
- Dropout rates correlated with COVID-19 cases, and Penta3 coverage changes were associated with the Human Development Index.
Conclusions:
- The COVID-19 pandemic significantly weakened the Dominican Republic's routine vaccination program performance.
- There is a critical need for interventions to recover and maintain vaccination coverage, especially in less developed areas.
- Failure to address coverage gaps increases the risk of outbreaks of vaccine-preventable diseases.
Abstract:
As the COVID-19 pandemic progresses, millions of infants are unprotected against immune-preventable diseases due to interruptions in vaccination services. The direct effects of the pandemic, as well as the non-pharmacological interventions for its containment, mitigation and suppression adopted by many countries, have affected their vaccination programs. We conducted an ecological study analyzing the performance of the vaccination program in the Dominican Republic before (2019) and during the COVID-19 pandemic (2020). We compared annual public coverage data, analyzed trends and changes in coverage, dropout rate, and number of partially and unvaccinated infants by geographic area and COVID-19 incidence rate. Compared to baseline, coverage for all vaccines decreased by 10.4 (SD, 3.6) percent; among these, coverage for the third dose of the pentavalent vaccine decreased from 90.1% in 2019 to 81.1% in 2020. The number of partially vaccinated (n = 34,185) and unvaccinated (n = 5,593) infants increased 66% and 376%, respectively. The slight increase in the annual dropout rate (1.1%) was directly proportional to the number of COVID-19 cases per month. We found a significant association between the annual absolute change of Penta3 and the subnational Human Development Index. The pandemic significantly weakened the performance of the routine vaccination program. Interventions are needed to recover and maintain lost vaccination coverage, reducing the risk of outbreaks of preventable diseases, especially in those provinces with less human development.
More Related Videos
13:00Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits Oryctolagus cuniculus
Published on: July 31, 2021
16:56Sublingual Immunotherapy as an Alternative to Induce Protection Against Acute Respiratory Infections
Published on: August 30, 2014
Related Concept Videos
Vaccinations
Drug Dosing: Infants and Children
Factors Affecting the Risk of Infection
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
Healthcare Associated Infections II: Preventive Measures
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
Teratogenicity
Preventive Healthcare Services