Super-spreaders: a historical review.

Area of Science:

• Epidemiology
• History of Medicine
• Infectious Disease Dynamics

Background:

• The term 'super-spreader' has a complex and evolving history, with varied applications.
• Early concepts focused on gastrointestinal diseases, later shifting to airborne transmission (influenza, tuberculosis).
• The term's definition has fluctuated, encompassing mathematical models, sexually transmitted infections, and network theory.

Purpose of the Study:

• To reconstruct the historical development of the super-spreader concept.
• To analyze the diversification and changing meanings of super-spreading in epidemiology.
• To provide insight into the current multifaceted use of the term.

Main Methods:

• Historical review of epidemiological literature and concepts.
• Analysis of the evolution of epidemic modeling, from early stochastic models to network-based approaches.
• Tracing the term's usage across different diseases and contexts, including gastrointestinal, airborne, and sexually transmitted infections.

Main Results:

• The concept originated from early 20th-century outbreak analyses, initially focusing on non-respiratory diseases.
• Key events like the 1957-58 influenza pandemic and studies on tuberculosis highlighted airborne transmission and infectivity heterogeneity.
• The term 'super-spreader' was coined in 1972 and later adapted to explain disease persistence in vaccinated populations and network structures.

Conclusions:

• The understanding and application of 'super-spreader' have diversified significantly over time.
• Its historical trajectory reveals shifts in epidemiological focus from disease carriers to transmission dynamics and network influence.
• Understanding this history is crucial for interpreting its current, varied uses in disease control and research.