In the history of science, there are great scientists who, without being physicians, wrote golden pages in the History of Medicine. Such was Louis Pasteur, founder of scientific microbiology and immunology. Such was his follower Gaston Ramon (1886–1963), French veterinarian and immunologist who created 100 years ago first anatoxin for active prevention of diphtheria and later tetanus and thus opened era of anatoxins (toxoids) — vaccines based on toxin molecule devoid of toxic properties, but preserving immunogenicity and antigenic specificity. For many centuries, diphtheria (originally known as ‘croup’) was incurable contagious disease, especially among children. In XIX century, it affected in France up to 30,000 people per year and killed every second infected child. In 1888, at the Pasteur Institute (Paris), Emile Roux (1853–1933) and Alexandre Yersin (1863–1943) demonstrated for first time that symptoms of diphtheria are caused not by bacteria themselves, but by deadly toxin released by them. The long-term search for method of treatment and prevention of diphtheria did not bring the desired result. It will take many years, before Gaston Ramon in 1923 will be able to neutralize diphtheria toxin by acting on it with formalin at certain temperature and thus will receive “anatoxin”, mean of vaccination against diphtheria. The article analyzes stages of these studies, which proved high effectiveness of anatoxin and proceeded with widespread implementation of vaccination against diphtheria and later tetanus in short time in France and in Russia (with active participation of Pavel F. Zdrodovsky, 1890–1976). The separate section of the article is devoted to life story of Gaston Ramon and his activities in the Pasteur Institute. The scientist who opened the era of anatoxins did not become Nobel Prize winner, despite the fact that various organizations and scientists from many countries of the world have nominated him 155 times for the Nobel Prize in Physiology or Medicine in different years. He received recognition in France, his Motherland: Gaston Ramon is holder of the Grand Cross of the Order of the Legion of Honor and streets, colleges, lyceums, schools are named after him.

history of microbiology and vaccinology, Gaston Ramon, anatoxin (toxoid), diphtheria, , tetanus., history of microbiology and vaccinology, Gaston Ramon, anatoxin (toxoid), diphtheria, , tetanus..