Influenza A (H1N1) transmission by road traffic between cit-ies and towns

	This image shows spatial distribution of all Changsha influenza A (H1N1) cases. Click here for more information.

Influenza A (H1N1) was spread widely between cities and towns by road traffic and had a major impact on public health in China in 2009. Understanding regulation of its transmission is of great significance with urbanization ongoing and for mitigation of damage by the epidemic. Researchers analyzed influenza A (H1N1) spatiotemporal transmission and risk factors along roads in Changsha, and combined diffusion velocity and floating population size to construct an epidemic diffusion model to simulate its transmission between cities and towns.