title: George C Williams Prize 2015.
authors.affiliation: Center for Infectious Disease Dynamics, Departments of Biology and Entomology, Pennsylvania State University, University Park, PA 16802, USA a.read@psu.edu.
authors.forename: Andrew F
authors.initials: AF
authors.lastname: Read
authors.affiliation: Department of Anthropology and Wolfson Research Institute for Health and Wellbeing, Durham University, Durham, UK.
authors.forename: Gillian R
authors.initials: GR
authors.lastname: Bentley
authors.affiliation: Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
authors.forename: David
authors.initials: D
authors.lastname: Haig