1. State Research Centre of Virology and Biotechnology "Vector" Rospotrebnadzor, Koltsovo, Novosibirsk Region, Russia
2. Hygienic and Epidemiological Centre of Astrakhan Region, Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor) Astrakhan, Russia
3. Astrakhan Regional office of Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor), Astrakhan, Russia
4. Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor), Moscow, Russia