Musa Abdullayev of many scientific inventions and fundamental works. The untimely death of Musa Abdullayev, subjected to the repression because of his political activity in the name of independent Azerbaijan, suffered much as a result of torments in exile for the sake of his nation and homeland, but lived an unbreakable, unshakable life as a citizen, is not only the loss of a family. The premature death of a scientist distinguished by his outstanding discoveries is a great and irreplaceable loss for Azerbaijan, Azerbaijani medical science, and for the history of Azerbaijani translation. Prominent scientist Musa Abdullayev died on August 8, 1979, at the age of 51 in Baku. He was married. He has 4 children and grandchildren. He spoke English, Russian, Persian, and Arabic. Scientific activity In addition to the publication of scientific papers having great importance for medicine and met with interest by the medical community in the magazine "Problems of Hematology and Blood Transfusion". Musa Abdullayev wrote fundamental works on the problems of cardiology and allergology as well. For the first time in the USSR, in 1979, he compiled an "English-Azerbaijani medical dictionary",. His books "Notes on Military Field Therapy" and "Methods of Teaching the Internal Medicine Propaedeutics", as well as "Clinical Interpretation of Laboratory Tests", "Bronchial Asthma is an Allergic Disease", "Some Diseases of the Blood System" are still valuable for medical students. The prominent scientist studied the epidemiology of hemophilia, electron microscopy of platelets, the role of calcium in the process of blood clotting, donation issues, etc. conducted scientific research on other topics presenting great scientific importance. His scientific paper presented to the attention of the general medical community at the International Congress against Cancer held in 1962, concerning the problems of blood clotting process caused detailed discussion and was accepted as a product of a deep research in this field. Proceedings of the VII Congress of the International Society of Hematologists, held in Rome, Italy on September 18, 1958, were translated from English into Russian by Musa Abdullayev. The editor of the translation was a corresponding member of the Azerbaijan National Academy of Sciences, doctor of medical sciences, professor Fuad Afendiyev. 3 articles of M.Abdullayev were included in the materials of the first conference held in 1960 between the Transcaucasian Institutes of Hematologists and Blood Transfusion. The first article called "The coagulation system in the blood of patients with various splenomegaly and the state