The infectious diseases included in this book are vaccinia, smallpox, chickenpox, scarlet fever, measles, rubella, fourth disease, erythema infectiosum, typhus fever, diphtheria, Vincent's angina, mumps, whooping cough, erysipelas and cerebrospinal meningitis. The title, consequently, is not definite enough. Typhoid, epidemic poliomyelitis, influenza, pneumonia, tularemia and Rocky Mountain spotted fever are also acute infectious diseases. Why the line is drawn as it is, does not appear. The major part of the book deals with vaccinia and smallpox, scarlet fever, measles and diphtheria. Vaccination is considered at great length. There is a good chapter on serum disease. The book contains a vast amount of reliable information well arranged and clearly stated, but the style in general is verbose. One error may be corrected: Howard T. Ricketts, whose name is preserved in "rickettsia," did not die of Rocky Mountain spotted fever (page 581) but of typhus fever which he was studying in Mexico