RT Journal A1 McCONNELL G T1 THe blood picture of those inoculated with influenza vaccine JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1919 FD May 17 VO 72 IS 20 SP 1457 OP 1458 DO 10.1001/jama.1919.02610200029012 UL http://dx.doi.org/10.1001/jama.1919.02610200029012 AB One of the most widely discussed questions at the present time is the relation, if any, that exists between B. influenzae (Pfeiffer's bacillus) and the recent pandemic. From the bacteriologic point of view it would seem that many investigators throughout the world have serious doubts as to the etiologic significance of the influenza bacillus in this condition. Many believe that some form of micrococcus is the exciting agent, while other well-known men, such as Hektoen and Vaughan, state that it is "a disease of unknown origin."In the clinical reports of the epidemic, the majority of observers agree as to the presence of a more or less well-marked leukopenia. Little, Garofalo and Williams1 report that the present epidemic is not characterized by a sharp leukocytosis and polynucleosis, but rather by a very slight leukocytosis with a proportional lymphocytosis of the small mononuclear variety. Keegan,2 in the examination of