1 UK Public Health Rapid Support Team, Public Health England, Porton Down SP4 0JG, UK; London School of Hygiene & Tropical Medicine, London, UK; Windward Island Research and Education Foundation, St George's, Grenada. Electronic address: jonathan.ashcroft@phe.gov.uk.
2 Bioethics Division, Department of Clinical Skills, St George's University, St George's, Grenada; Windward Island Research and Education Foundation, St George's, Grenada.