undertaken! Imbalances in presentation are exemplified by the treatment of Bacteroides (just a half-page) whilst Myco leprae fills more than two pages. On p.315 the multiple pressure method of smallpox vaccination is said to be a special procedure! On p.47 the brief paragraph on 'Droplets' frightens the reviewer-it is non-informed and tells the reader nothing of significance of large droplets c...

From the Department of Health Care Policy, Harvard Medical School, and the Palliative Care Service, Department of Medicine, Massachusetts General Hospital — both in Boston (N.A.C.); the Department of Sociology, Harvard University, Cambridge, Mass. (N.A.C.); and the Department of Sociology, University of Pennsylvania, Philadelphia (P.D.A.). Address reprint requests to Dr. Christakis at the Depar...