1 Rollins School of Public Health, Atlanta, GA 30322, USA. Electronic address: scottjnmcnabb@emory.edu.
2 Public Health Practice, LLC, Atlanta, GA, USA; Ministry of Health, Riyadh, Saudi Arabia.
3 UPMC Center for Health Security, Baltimore, MD, USA.
4 Division of Infection and Immunity, University College London, London, UK; NIHR Biomedical Research Centre, University College London Hospitals, London, UK.
5 Centre on Global Health Security, Chatham House, London, UK; Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.