The book "Epidemic Diseases of the Respiratory Tract. Pneumonia and Other Respiratory Tract Infections Accompanying Influenza and Measles" is a joint effort of distinguished authors Eugene Lindsay Opie, Francis Gilman Blake, Thomas Milton Rivers, and James Craig Small. This book covers a number of epidemic diseases of the respiratory tract, including pneumonia and other infections, which are observed in patients with influenza and measles. The authors have deeply studied these diseases, their causes, symptoms and methods of treatment. This book will become an indispensable source of knowledge for specialists in the field of medicine and epidemiology, as well as for all those interested in issues of public health and protection from infectious diseases.