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Spread of contagions via contact tracing
Valdis Krebs
Project Description:
An airborne contagion, such as SARS or TB, spreads through human networks based on who comes in contact with whom, and how infectious and susceptible each party is. Multiple contacts play a role in the probability of infection.

Public health officials perform contact tracing to map the spread of the infection and manage its diffusion. The network on the left shows the spread of an airborne infectious disease. The map was created using actual contact data from the community in which the outbreak was happening. Black nodes are persons with clinical disease (and are potentially infectious), pink nodes represent exposed persons with incubating (or dormant) infection and are not infectious, green represent exposed persons with no infection and are not infectious. The infection status is unknown for the grey nodes.

Unfortunately the 'social butterfly' in this community, the black node in the center of the graph, is also the most infectious -- a super spreader.

Comments (1):
My father in 2000 was infected by his 4th wife who came from the Philippines. He died in February 2005. They were married and is still being treated with TB.

Posted by Peter on May 5, 2008 at 12:11 AM (GMT)

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