St Petersburg University, Saint Petersburg State University, affiliation not provided to SSRN, affiliation not provided to SSRN, Saint Petersburg State University, Saint Petersburg State University, Pasteur Institute of Epidemiology and Microbiology, Pasteur Institute of Epidemiology and Microbiology, affiliation not provided to SSRN, affiliation not provided to SSRN and Nanjing University of Aeronautics and Astronautics