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Achieving herd immunity in South America.

Don Eliseo Lucero-Prisno^1,2,3, Deborah Oluwaseun Shomuyiwa⁴, Creuza Rachel Vicente^5,6

¹Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK.

Global Health Research and Policy

|February 2, 2023

Summary

South America achieved a high COVID-19 vaccination rate, demonstrating public trust and acceptance of vaccines. Continued efforts in vaccine supply, equity, and local production are key to advancing population protection and potentially achieving herd immunity.

Keywords:

COVID-19 Herd immunity Pandemic Population health South America Vaccination

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Area of Science:

Epidemiology
Public Health
Immunology

Background:

South America faced significant challenges during the COVID-19 pandemic, with high infection rates and strained healthcare systems.
The region has since implemented robust public health strategies to manage the ongoing pandemic.
A strong vaccination culture and public confidence have been pivotal in the region's response.

Purpose of the Study:

To analyze the COVID-19 pandemic management strategies in South America.
To highlight the region's success in achieving high vaccination rates.
To identify factors contributing to vaccine acceptance and explore pathways toward herd immunity.

Main Methods:

Observational analysis of regional pandemic response data.
Review of vaccination coverage statistics and public health system performance.
Assessment of factors influencing vaccine acceptance and trust.

Main Results:

South America has become the region with the highest global vaccination rate, with over 76% of the population fully vaccinated.
The high vaccination uptake reflects strong public trust in vaccination and public health systems.
Herd immunity is not yet feasible but high vaccination rates indicate acceptance of vaccination as a population protection strategy.

Conclusions:

Leveraging deep-rooted vaccination culture and public confidence has been crucial for South America's pandemic response.
Achieving herd immunity requires continued vaccine supply, equitable access, improved acceptance, and trust.
Local vaccine production, infrastructure investment, and international collaboration are vital for future population safety and pandemic preparedness.