FIELD: medicine, pharmaceutics.
SUBSTANCE: invention refers to biotechnology, virology and medicine. A virus is characterised by the fact that it contains a genomic segment coding a polypeptide with SEQ ID NO:18. There are also described immunogenic compositions containing these viruses, and a method for preventive treatment of influenza A virus infection. The invention may be used in medicine.
EFFECT: what is presented is a reassortant influenza virus for producing vaccines.
17 cl, 15 dwg, 2 tbl
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