||While the Web of
Causation was conceived to enhance understanding of noncommunicable chronic
disease, this model also has application to communicable disease and injury.
One interesting communicable disease example involves unanticipated
consequences of economic development, and more particularly Trypanosymiosis
or “sleeping sickness” that spread across Africa in the wake of new roads.
The agent was carried behind trucks by its vector, the tsetse fly, with fly
bites being the mode of disease transmission.