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93 Or. L. Rev. 1 (2014-2015)

handle is hein.journals/orglr93 and id is 1 raw text is: OREGON 2014 VOLUME 93 LAW NUMBER 1 REVIEW Articles MARY HOLLAND AND CHASE E. ZACHARY* Herd Immunity and Compulsory Childhood Vaccination: Does the Theory Justify the Law? A bstract ........................................................................................... 3 Introduction ..................................................................................... 3 I. Herd Immunity and Its Assumptions ................................... 7 A. Herd Immunity Threshold .............................................. 8 B . H erd Effect .................................................................... 8 C. The Free Rider Problem ................................................ 9 D. Assumptions Underlying Herd Immunity Theory ..... 10 * Mary Holland is a Research Scholar and Director of the Graduate Lawyering Program at New York University School of Law. Chase Zachary received his J.D. degree from NYU School of Law in 2014, and he has a Ph.D. in Chemistry from Princeton University. The authors may be reached at the NYU School of Law, 40 Washington Square South, 107 Vanderbilt Hall, New York, NY 10012, mary.holland@nyu.edu and czachary@nyu.edu. They would like to thank Mark Blaxill, James Holland, Patricia Rawlinson, Jenny Roberts, Juliet Stumpf, Eva Vanamee, and several anonymous reviewers for their helpful comments. They also thank Jesus Ballivian for valuable administrative support.