Phlebitis, in our series usually of the formal vein, occurred about as often as it does in typhoid fever. The end result, however, is much better than in typhoid. We have seen only one case where “the milk leg” has resulted. Rest and elevation of the limb were all that we required. In the acute stage, if pain was present, a light, carefully applied icebag was added. It is important to rest the limb for at least two or three weeks, and to caution the patient against remaining on the feet too long for some weeks after recovery. We saw a great deal of acute sinus infection, often occurring even while the attack of influenza was present, but, as a rule, this complication followed the attack. At times several weeks intervened. The ethmoidal sinuses are most susceptible, but a considerable number of acute frontal sinus infections were noted, the latter often immediately following or occurring during the acute period of the influenza attack. The majority of these infections appeared transient, and disappeared with a little local treatment. In fact, in frontal sinusitis cold applications seemed to be all that was necessary. With some of the more chronic infections nose and throat surgery has been followed by relief of symptoms. Acute suppurative otitis media, considering the number of influenza patients, was not common. Ear drum puncture was done if necessary. We saw one case of acute mastoiditis develop. The mastoid process was opened and drained. Acute suppurative meningitis, following or associated with pneumonia, appeared on three occasions. The pneumococcus was cultured from the spinal fluid in all cases. Anti-pneumococcus sera intraspinally (Type I or the Kyes serum) should be given. The Type I serum is of value in a similar group infection. We have had no experience with this method, but some recoveries from pneumococcus meningitis have been reported after the early use of serum given into the spinal canal.