How the Structure of Contact Networks Affects Disease Propagation
Friday, November 21, 2003 - 1:30pm - 2:20pm
Mark Newman (University of Michigan)
I will discuss observational results on the statistical properties of contact networks, including degree distributions, correlation properties, transitivity, and assortativity. I will also discuss models of disease propagation on networks that have these properties and describe how the properties in question affect the spread of the disease. Some results are already well known, such as the fact that highly degree-assortative networks support epidemics at lower density, but others are not, such as the fact that high levels of transitivity cause diseases to saturate populations in regimes only slightly above the epidemic threshold.