Before revision:  Models of contact networks are increasingly used for these purposes , and are often appropriate for infections that spread from person to person . Real-world human contact networks are rich in structural features that influence infection transmission, such as tightly-knit local communities that are weakly connected to one another.
After revision:  Models of contact networks are increasingly used for these purposes , and are often appropriate for infections that spread from person to person . Real-world contact networks are rich in structural features that influence infection transmission, such as tightly-knit local communities that are weakly connected to one another.