1. Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
2. IHU-Méditerranée Infection, Marseille, France
3. Aix Marseille University, IRD, AP-HM, SSA, VITROME, Marseille, France
4. The Global Centre for Mass Gatherings Medicine, Ministry of Health, Riyadh, Saudi Arabia
5. French Military Centre for Epidemiology and Public Health, Marseille, France