In the past decade or so, leading investigators have begun to incorporate social networks into their models, trying to identify and analyze patterns of individual behavior that amplify or mute potential pandemics.

Here’s an interesting article from the NYT.

Those findings, in turn, inform policy recommendations. When does it make sense to shut down schools or workplaces? When will closing a border make a difference, and when won’t it? World health officials consult with social network modelers on a near daily basis, and Dr. Vespignani’s lab is part of one of several consortiums being consulted in the crucial and perhaps disruptive decisions coming in the next few weeks. On Friday, in an analysis posted by the journal Science, the group estimated that China’s travel ban on Wuhan delayed the growth of the epidemic by only a few days in mainland China and by two to three weeks elsewhere. “Moving forward we expect that travel restrictions to COVID-19 affected areas will have modest effects,” the team concluded.