The textbook "Immunology", 4th edition (published in September 2021), was prepared by a well-known Soviet and Russian scientist of world renown, immunologist, doctor of medical sciences, professor, academician of the Russian Academy of Sciences Rakhim Musaevich Khaitov. The new edition is an updated, revised and enlarged version of the textbook, which over the past 15 years has become one of the best textbooks on immunology. It is used all over the place. Throughout Russia and in the CIS countries, by medical and biological students, physicians, researchers in the field of immunology and allergology, microbiology, virology, infectology, vaccinology and others related fields of science. So, the textbook "Immunology" by R.М. Khaitov is one of the best in Russia, one of the most demanded and recognized textbooks.