1. Institute for Aerospace Studies, University of Toronto, Toronto, Ontario M3H 5T6, Canada
2. Nicholas School of Environment, Duke University, Durham, North Carolina 27710, USA
3. Global Institute of Health, Duke University, Durham, North Carolina 27710, USA
4. Gilligs School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, USA
5. Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Ontario M5S 3H2, Canada
6. Fields Institute for Research in Mathematical Sciences, Toronto, Ontario M5T 3J1, Canada
7. Department of Mathematics, University of Toronto, Toronto, Ontario M5S 2E4, Canada