The model he’d built with his daughter showed that there was no difference between giving a person a vaccine and removing him or her from the social network: in each case, a person lost the ability to infect others. Yet all the expert talk was about how to speed the production and distribution of vaccines. No one seemed to be exploring the most efficient and least disruptive ways to remove people from social networks. “I had this sudden fear,” said Bob. “No one is going to realize what you could do.”
