1 Institut Pasteur, Université Paris Cité, Unité d'Épidémiologie des Maladies Émergentes, Paris 75015, France; CIC Cochin Pasteur, Assistance Publique-Hôpitaux de Paris, Paris, France.
2 Department of Surgery and Cancer, Liver Unit, St Mary's Hospital, Imperial College London, London, UK; Medical Research Council Unit, London School of Hygiene & Tropical Medicine, Fajara, The Gambia.
3 Department of Surgery and Cancer, Liver Unit, St Mary's Hospital, Imperial College London, London, UK; Medical Research Council Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK.
4 Institut Pasteur, Université Paris Cité, Unité d'Épidémiologie des Maladies Émergentes, Paris 75015, France. Electronic address: yusuke.shimakawa@gmail.com.