Journal "Infektsiya i immunitet" ("Russian Journal of Infection and Immunity") established by Northwest Branch of RAMS, St. Petersburg Pasteur Institute and the St. Petersburg branch of the Russian Association of Allergologists and Clinical Immunologists, with the participation of the St. Petersburg branch of All-Russian Practical Society of epidemiologists, microbiologists and parasitologists at St. Petersburg and Leningrad region. The journal is devoted to numerous aspects of the interaction between different microorganisms and the host organism. Journal is of interest for microbiologists, immunologists, epidemiologists and clinicians. The most detailed discussion of the following questions: • molecular basis of infections caused by pathogenic bacteria, fungi and parasites; • mechanisms of pathogenicity of microorganisms; • the impact of microbial virulence factors on host cells; • factors and mechanism to protect the host from infection; • factors of nonspecific and specific immunity; • experimental models of infectious disease; • development of vaccines and nonspecific anti-infectious defense.