This report has been reviewed in draft form by individuals chosen for their diverse perspectives and technical expertise, in accordance with procedures approved by the National Research Council’s Report Review Committee. The purpose of this independent review is to provide candid and critical comments that will assist the institution in making its published report as sound as possible and to ensure that the report meets institutional standards for objectivity, evidence, and responsiveness to the study charge. The review comments and draft manuscript remain confidential to protect the integrity of the deliberative process. We wish to thank the following individuals for their review of this report:

John Bailar, University of Chicago, Illinois

Ruth Berkelman, Center for Public Health Preparedness and Research, Rollings School of Public Health, Emory University, Atlanta, Georgia

Lora Hooper, Center for Immunology, University of Texas Southwestern Medical Center, Dallas

Stephen S. Morse, Center for Public Health Preparedness, School of Public Health, Columbia University, New York

The review of this report was overseen by Melvin Worth, Scholar-in-Residence, National Academies, who was responsible for making certain that an independent examination of this report was carried out in accordance with institutional procedures and that all review comments were carefully considered. Responsibility for the final content of this report rests entirely with the authoring committee and the institution.