History of Influenza in Iran until the End of the Qajar Era

The issue of disease in the context of history has always been one of the concerns of the wise man. In accordance with the intellectual system of each period of history, various diseases have been identified and prevention and treatment strategies have been presented. The identification of some diseases, including the flu, goes back to a new era. The use of the word "flu" first occurred in the Qajar era. Because it is new and unknown, the group of physicians, as the person in charge of health matters, needed to know about this disease and define and explain it. The purpose of this study as a historical-review study, in the first step is to study the history of the prevalence of this disease in Iran and the process of recognizing it through the available information sources in the Qajar era society. The medical approach of the press (publications) and the identification and introduction of " RESALE DAR MARAZ_E ANFLUENZA: GRIP" as the first treatise written about this disease, has been done at this stage. The second step of the present study is to investigate how the Spanish flu entered Iran and assesses its consequences in the affected areas.