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Updated: May 19, 2026

Comprehensive & Cost Effective Laboratory Monitoring of HIV/AIDS: an African Role Model
Published on: October 31, 2010
HIV, logic and sex in Africa
Lucy Allais1, W D Francois Venter
1The Philosophy Department, The University of Witwatersrand, Johannesburg, 2000, South Africa. Lucy.Allais@wits.ac.za
Insights
The widely accepted
Area of Science:
- Epidemiology
- Public Health
- Behavioral Science
Background:
- High rates of HIV infection in sub-Saharan Africa have been attributed to multiple concurrent partnerships.
- Concurrency, or the simultaneous engagement in multiple sexual relationships, is a proposed driver of HIV transmission.
- This explanation has been widely accepted in the region.
Purpose of the Study:
- To critically evaluate the 'concurrency hypothesis' as an explanation for high HIV infection rates in sub-Saharan Africa.
- To examine the conceptual and empirical limitations of the concurrency explanation.
- To determine if 'concurrency' offers distinct insights into HIV epidemiology in the region.
Main Methods:
- Conceptual analysis of the 'concurrency hypothesis'.
- Review of existing literature on sexual partnering and HIV transmission in sub-Saharan Africa.
- Examination of the definition and application of the term 'concurrency'.
Main Results:
- The study identifies two significant problems with the concurrency explanation.
- The term 'concurrency' is imprecise and lacks a clear, singular definition.
- There is no single, well-defined 'concurrency hypothesis' that adequately explains HIV rates.
Conclusions:
- The concurrency explanation does not contribute to understanding the unusually high rates of HIV infection in sub-Saharan Africa.
- The concept of 'concurrency' is too vague to identify an explanatorily distinct form of sexual behavior.
- Alternative explanations are needed to understand HIV epidemiology in the region.
Abstract:
A widely accepted explanation of the dramatically high rates of HIV infection in sub-Saharan Africa appeals to a supposedly distinct model of sexual partnering, referred to as 'multiple concurrent partnerships' or 'concurrency.' We discuss two problems with the concurrency explanation, and argue that it does not contribute to understanding the unusual rates of HIV infection in the region. We argue that there is no single 'concurrency hypothesis,' and the term 'concurrency' is imprecise and does not pick out an explanatorily distinct form of sexual behavior.
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