Nicole Mideo1, Tsukushi Kamiya2,3. 1. Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada. nicole.mideo@utoronto.ca. 2. HRB Clinical Research Facility, National University of Ireland, Galway, Ireland. 3. Institute of Evolutionary Biology, Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK.