Director of the Department of Epidemiology, Head of the Research Centre for Emerging and Reemerging infectious diseases, and Director of the National Reference Laboratory for Plague, Tularemia and Q fever in Pasteur Institute of Iran, Tehran, Iran; WHO EMRO temporary adviser on zoonotic infections, and member of IHR roster of experts of WHO HQ in human-animal interface and Roster of Experts of WHO EMRO for Infectious Hazard Management; A Member of the WHO Technical Advisory Group on Arbovirus.