To provide an overview of the history and contemporary landscape of childhood vaccination, focusing on low- and middle-income countries and the impact on public health.
Approach:
Historical Foundations: The origins of vaccination began with smallpox, with significant milestones including Edward Jenner's cowpox observation and Louis Pasteur's laboratory-made vaccines.
Global Coordination and Key Achievements: The establishment of WHO's Expanded Programme on Immunisation (EPI) in 1974 aimed to increase vaccine coverage in low- and middle-income countries, leading to significant improvements.
Enabling Factors: Innovation & Safety: Technological innovations and safety monitoring systems have enhanced vaccine development and public confidence, with combination vaccines and new platforms like mRNA improving immunisation efforts.
Key Findings:
Pediatric vaccines have averted approximately 154 million deaths in the past 50 years.
The EPI increased vaccine coverage from 5% to over 80% in many LMICs.
Gavi has supported the vaccination of over one billion children in 78 lower-income countries.
The eradication of smallpox and significant reductions in measles mortality demonstrate the impact of coordinated immunisation efforts.
Interpretation:
Understanding the historical context and current challenges of vaccination is crucial for maintaining and improving immunisation coverage globally.
Limitations:
Immunisation coverage remains uneven across countries.
Challenges persist in reaching children in conflict-affected areas and informal settlements.
Conclusion:
The review highlights the importance of historical insights and current trends in pediatric vaccination to ensure continued protection against preventable diseases.
