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Volume 13, Number 9—September 2007

Research

Frequent Travelers and Rate of Spread of Epidemics

T. Déirdre Hollingsworth*Comments to Author , Neil M. Ferguson*, and Roy M. Anderson*
Author affiliations: *Imperial College London, London, United Kingdom;

Main Article

Figure 1

Schematic representation of the model structure. Black boxes represent infectious stages and arrows indicate that persons in these populations are allowed to fly. A) Severe acute respiratory syndrome. Persons with latent infections are not infectious, and all infectious persons are symptomatic and prevented from traveling. B) Pandemic influenza. Persons with latent infections are infectious, and a proportion (1 – s) of infectious persons are asymptomatic and allowed to travel (indicated by the dotted arrows). The size of the arrows indicates that the persons in the high-frequency flier group have a higher probability of flying per day.

Figure 1. Schematic representation of the model structure. Black boxes represent infectious stages and arrows indicate that persons in these populations are allowed to fly. A) Severe acute respiratory syndrome. Persons with latent infections are not infectious, and all infectious persons are symptomatic and prevented from traveling. B) Pandemic influenza. Persons with latent infections are infectious, and a proportion (1 – s) of infectious persons are asymptomatic and allowed to travel (indicated by the dotted arrows). The size of the arrows indicates that the persons in the high-frequency flier group have a higher probability of flying per day.

Main Article

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