This entire monograph is devoted to a clinical discussion of common grip as it occurs in children. Müller considers grip to be a generalized infection due to an ultramicroscopic virus. The complications, however, are attributed to secondary invasion by bacteria which are normally present in the body but become pathogenic because of the conditions produced by the disease. There is a lengthy discussion of the complications and sequelae, i. e., cervical adenitis, otitis media, sinusitis of the nasal accessory cells, bronchitis, pneumonia, enteritis, urinary infections, cardiovascular disturbances, cerebral manifestations, rheumatic symptoms and purpura. In the prophylaxis of grip the avoidance of contact with ill children is advised, but most important of all is the building up of the nutrition and resistance of the child by proper diet, sunshine, rest, exercise and other factors. The general management of the patient with grip and the special treatment of each of the complications