December 10, 2021 marks the 90th anniversary of the birth and 65 years of the scientific activity of Academician of the Russian Academy of Sciences, Doctor of Medical Sciences, Professor Felix Ivanovich Ershov. F.I. Ershov is a prominent scientist-virologist, popularizer of science, known in our country and abroad, one of the leading experts on the problem of interferon and its inducers. Staff members of the National Research Center for Epidemiology and Microbiology named after Honorary Academician N.F. Gamaleya, friends, colleagues and students sincerely congratulate Felix Ivanovich Ershov on his anniversary and wish him new creative successes, health, long and happy years of life!