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CONSIDERATIONS
FOR
VIRAL DISEASE
ERADICATION
Lessons Learned and
Future Strategies
Workshop Summary
Stacey Knobler, Joshua Lederberg, and Leslie A. Pray, Ea/itors
Forum on Emerging Infections
Board on Global Health
INSTITUTE OF MEDICINE
NATIONAL ACADEMY PRESS
Washington, D.C.
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NATIONAL ACADEMY PRESS 2101 Consutut~on Avenue, N.W. Washington, DC 20418
NOTICE: The project that is the subject of this report was approved by the Governing Board of the
National Research Council, whose members are drawn from the councils of the National Academy
of Sciences, the National Academy of Engineering, and the Institute of Medicine.
Support for this project was provided by the U.S. Department of Health and Human Services'
National Institutes of Health, Centers for Disease Control and Prevention, and Food and Drug
Administration; U.S. Department of Defense; U.S. Department of State; U.S. Department of Veterans
Affairs; U.S. Agency for International Development; Abbott Laboratories; American Society for
Microbiology; Bristol-Myers Squibb Company; Burroughs Wellcome Fund, Eli Lilly & Company;
The Ellison Medical Foundation; Glaxo Wellcome; F. Hoffmann-La Roche AG; Pfizer, Inc.;
SmithKline Beecham Corporation; and Wyeth-Ayerst Laboratories. The views presented in this
report are those of the Institute of Medicine Forum on Emerging Infections and are not necessarily
those of the funding agencies.
This report is based on the proceedings of a workshop that was sponsored by the Forum on
Emerging Infections. It is prepared in the form of a workshop summary by and in the name of the
editors, with the assistance of staff and consultants, as an individually authored document. Sections
of the workshop summary not specifically attributed to an individual reflect the views of the editors
and not those of the Forum on Emerging Infections. The content of those sections is based on the
presentations and the discussions that took place during the workshop.
Library of Congress Cataloging-in-Publication Data
Considerations for viral disease eradication: lessons learned and
future strategies: workshop summary / Stacey Knobler, Joshua Lederberg,
and Leslie A. Pray, editors; Forum on Emerging Infections, Board on
Global Health, Institute of Medicine.
p. ; cm.
Includes bibliographical references.
ISBN 0-309-08414-8 (pbk.)
1. Virus diseases—Vaccination Congresses. 2. Virus
diseases—Prevention—Congresses. 3 . Medical policy—Congresses.
[DNLM: 1. Communicable Disease Control—trends~ongresses. 2.
Immunization—trends~ongresses. 3. Virus Diseases—prevention &
control~ongresses. 4. Health Policy Congresses. 5. World
Health—Congresses. WA 110 C755 2002] I. Knobler, Stacey. II.
Lederberg, Joshua. m. Pray, Leslie A. IV. Institute of Medicine
(U.S.). Forum on Emerging Infections.
RA644.V55 C66 2002
614.5'75—dc21
2002005549
Additional copies of this report are available for sale from the National Academy Press, 2101
Constitution Avenue, N.W., Box 285, Washington, DC 20055. Call (800) 624-6242 or (202) 334-
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Copyright 2002 by the National Academy of Sciences. All rights reserved.
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COVER: The background for the cover of this workshop summary is a photograph of a batik
designed and printed specifically for the Malaysian Society of Parasitology and Tropical Medicine.
The print contains drawings of various parasites and insects; it is used with the kind permission of
the Society.
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"I(nowin,g is not enough; we mast apply.
Willin,g is not enough; we must do. "
- Goethe
,~
Ad/
INSTITUTE OF MEDICINE
Shaping the Future for Health
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National Academy of Sciences
National Academy of Engineering
Institute of Medicine
National Research Council
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The National Academy of Sciences is a private, nonprofit, self-perpetuating society
of distinguished scholars engaged in scientific and engineering research, dedicated
to the furtherance of science and technology and to their use for the general welfare.
Upon the authority of the charter granted to it by the Congress in 1863, the Acad-
emy has a mandate that requires it to advise the federal government on scientific and
technical matters. Dr. Bruce M. Alberts is president of the National Academy of
~ .
Sciences.
The National Academy of Engineering was established in 1964, under the charter of
the National Academy of Sciences, as a parallel organization of outstanding engi-
neers. It is autonomous in its administration and in the selection of its members,
sharing with the National Academy of Sciences the responsibility for advising the
federal government. The National Academy of Engineering also sponsors engineer-
ing programs aimed at meeting national needs, encourages education and research,
and recognizes the superior achievements of engineers. Dr. Wm. A. Wulf is presi-
dent of the National Academy of Engineering.
The Institute of Medicine was established in 1970 by the National Academy of
Sciences to secure the services of eminent members of appropriate professions in the
examination of policy matters pertaining to the health of the public. The Institute
acts under the responsibility given to the National Academy of Sciences by its
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The National Research Council was organized by the National Academy of Sciences
in 1916 to associate the broad community of science and technology with the
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Functioning in accordance with general policies determined by the Academy, the
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of Sciences and the National Academy of Engineering in providing services to the
government, the public, and the scientific and engineering communities. The Coun-
cil is administered jointly by both Academies and the Institute of Medicine. Dr.
Bruce M. Alberts and Dr. Wm. A. Wulf are chairman and vice chairman, respec-
tively, of the National Research Council.
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FORUM ON EMERGING INFECTIONS
JOSHUA LEDERBERG (Chair), Raymond and Beverly Sackler
Foundation Scholar, The Rockefeller University, New York,
New York
STEVEN BRICKNER, Research Advisor, Pfizer Global Research and
Development, Pfizer Inc., Groton, Connecticut
GAIL CASSELL, Vice President, Infectious Diseases, Eli Lilly &
Company, Indianapolis, Indiana
GARY CHRISTOPHERSON, Senior Advisor for Force Health
Protection, Office of the Assistant Secretary of Defense, Department
of Defense, Washington, D.C.
GORDON DEFRIESE, Professor of Social Medicine, University of North
Carolina, Chapel Hill, North Carolina
CEDRIC DUMONT, Medical Director, U.S. Department of State and
Foreign Service, Washington, D.C.
JESSE GOODMAN, Deputy Director, Center for Biologics Evaluation
and Research, Food and Drug Administration, Rockville, Maryland
RENU GUPTA, Vice President and Head, U.S. Clinical Research and
Development, and Head, Global Cardiovascular, Metabolic,
Endocrine, and G.I. Disorders, Novartis Corporation, East Hanover.
New Jersey
MARGARET HAMBURG, Vice President for Biological Programs,
Nuclear Threat Initiative, Washington, D.C.
CAROLE HEILMAN, Director, Division of Microbiology and Infectious
Diseases, National Institute of Allergy and Infectious Diseases,
National Institutes of Health, Bethesda, Maryland
JAMES HURRIES, Assistant Surgeon General and Director, National
Center for Infectious Diseases, Centers for Disease Control and
Prevention, Atlanta, Georgia
SAMUEL KATZ, Wilburt C. Davison Professor and Chairman Emeritus,
Duke University Medical Center, Durham, North Carolina
PATRICK KELLEY, Colonel, Director, Department of Defense Global
Emerging Infections System, Walter Reed Army Institute of Research,
Silver Spring, Maryland
MARCELLE LAYTON, Assistant Commissioner, Bureau of
Communicable Diseases, New York City Department of Health, New
York, New York
CARLOS LOPEZ, Research Fellow, Research Acquisitions, Eli Lilly
Research Laboratories, Indianapolis, Indiana
v
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LYNN MARKS, Global Head of Infectious Diseases, GlaxoSmithKline,
Collegeville, Pennsylvania
STEPHEN MORSE, Director, Center for Public Health Preparedness,
Columbia University, New York, New York
MICHAEL OSTERHOLM, Director, Center for Infectious Disease
Research and Policy and Professor, School of Public Health,
University of Minnesota, Minneapolis, Minnesota
GARY ROSELLE, Program Director for Infectious Diseases, VA Central
Office, Veterans Health Administration, Department of Veterans
Affairs, Washington, D.C.
DAVID SHLAES, Vice President, Infectious Disease Research, Wyeth,
Pear! River, New York
JANET SHOEMAKER, Director, Office of Public Affairs, American
Society for Microbiology, Washington, D.C.
P. PREDRICK SPARLING, I. Herbert Bate Professor Emeritus of
Medicine, Microbiology, and Immunology, University of North
Carolina, Chapel Hill, North Carolina
KAYE WACHSMUTH, Deputy Administrator, Office of Public
Health and Science, United States Department of Agriculture,
Washington, D.C.
C. DOUGLAS WEBB, Senior Medical Director, Bristol-Myers Squibb
Company, Princeton, New Jersey
Liaisons to the Forum
ENRIQIJETA BOND, President, Burroughs Welicome Fund, Research
Triangle Park, North Carolina
NANCY CARTER-FOSTER, Director, Program for Emerging Infections
and HIV/AIDS, U.S. Department of State, Washington, D.C.
MICHAEL MORAN, Associate Vice President of Clinical Affairs,
Pharmaceutical Research and Manufacturers Association,
Washington, D.C.
EDWARD) McSWEEGAN, National Institute of Allergy and Infectious
Diseases, National Institutes of Health, Bethesda, Maryland
STEPHEN OSTROFF, Associate Director for Epidemiologic Science,
National Center for Infectious Diseases, Centers for Disease Control
and Prevention, Atlanta, Georgia
FRED TENOVER, Chief, Nosocomial Pathogens Laboratory Branch,
National Center for Infectious Diseases, Centers for Disease Control
and Prevention, Atlanta, Georgia
At
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Staff
JONATHAN DAVIS, Senior Program Officer (until May 2001)
STACEY KNOBLER, Director, Forum on Emerging Infections
MAR]AN NAJAFI, Research Associate
LAURIE SPINELLI, Project Assistant
VII
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BOARD ON GLOBAL HEALTH
DEAN JAMISON (Chair), Director, Program on International Health,
Education, and Environment, University of California at Los Angeles
YVES BERGEVIN, Chief, Health Section, UNICEF, New York,
New York
DAVID CHALLONER (Institute of Medicine Foreign Secretary), Vice
President for Health Affairs, University of Florida, Gainesville
PATRICIA DANZON, Professor, Health Care Systems Development,
University of Pennsylvania, Philadelphia
RICHARD FEAC~M, Institute for Global Health, UC San Francisco/
UC Berkeley, San Francisco, California
NOREEN GOLDMAN, Professor, Woodrow Wilson School of Public
and International Affairs, Princeton University, Princeton, New Jersey
MARGARET HAMBURG, Vice President for Biological Programs,
Nuclear Threat Initiative, Washington, D.C.
EILEEN KENNEDY, Deputy Undersecretary, Research, Education, and
Economics, U.S. Department of Agriculture, Washington, D.C.
GERALD KEUSCH (Liaison) Director, Fogarty International Center
National Institutes of Health, Bethesda, Maryland
ARTHUR KLE1NMAN, Maude and Lillian Presley Professor of Medical
Anthropology/Professor of Psychiatry and Social Medicine, Harvard
Medical School, Boston, Massachusetts
ADEL MAHMOUD, President, Merck Vaccines, ~7hitehouse Station,
New Jersey
JOHN WON OWEN, Secretary, Nuffield Trust, London, United
Kingdom
ALLAN ROSENFIELD, Dean, Mailman School of Public Health.
Columbia University, New York, New York
SUSAN SCRIMSHAW, Dean, School of Public Health, University of
Illinois at Chicago
Staff
JUDITH: BALE, Director
PATRICIA CUFF, Research Associate
STACEY KNOBLER, Study Director
MAR]AN NAJAFI, Research Associate
KATHERINE OBERHOLTZER, Project Assistant
JASON PELLMAR, Project Assistant
MARK SMOLINSKI, Study Director
LAURIE SPINELLI, Project Assistant
vial
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Reviewers
This report has been reviewed in draft form by individuals chosen for
their diverse perspectives and technical expertise, in accordance with proce-
dures approved by the National Research Council's Report Review Com-
mittee. 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:
Jon Andrus, University of California, San Francisco, CA
Kenneth Bernard, Office of Senator Frist, U.S. Senate, Washington,
D.C.
David Heymann, World Health Organization, Geneva, Switzerland
Walter Orenstein, Centers for Disease Control and Prevention, Atlanta,
GA
Murray Trostle, U.S. Agency for International Development, Washing-
ton, D.C.
Although the reviewers listed above have provided many constructive
comments and suggestions, they were not asked to endorse the final draft of
the report before its release. The review of this report was overseen by
Charles Carpenter, M.D. Appointed by the National Research Council, he
lX
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x
REVIEWERS
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.
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PREFACE
SUMMARY AND ASSESSMENT
70shua Lederberg
1 INTRODUCTION
Ciro A. de Quadros
Contents
MAJOR EFFORTS FOR DISEASE ERADICATION
Smallpox, 34
D.A. Henderson
The Next Target After Polio: Global Eradication of Measles, 40
Stephen L. Cochi, Peter M. Strebel, Mark Papania,
William /. Bellini, Walter A. Orenstein
Eradication of Congenital Rubella Syndrome, 52
Stanley A. Plotkin
Post-Polio Eradication: Issues and Challenges, 57
Walter R. Dowdie
xv
1
22
33
3 BIOLOGICAL CHALLENGES TO POST-ERADICATION 64
Herd Immunity and the Design of Vaccination Programs, 65
Roy M. Anderson
Error, Hubris, and Malice, 77
C. |. Peters
Xl
l
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. .
It
4
CONTENTS
Natural SIV Reservoirs and Human Zoonotic Risk: Challenges to
Disease Eradication, 84
Beatrice H. Hahn
Vaccine-Associated Cases Due to Immunization with Live Virus
Vaccines, 90
Jeffrey I. Cohen
OPERATIONAL AND INSTITUTIONAL CHALLENGES TO
POST-ERA1;)ICATION 98
Revision of the International Health Regulations: Progress Report, 99
Mario Libel
Disease Surveillance, Program Management, and Sustainment of
Immunization Programs, 106
Donald S. Burke
The Capacity of Public Health Services to Respond to an Outbreak
in the Post-Eradication Era, 112
Car! E. Taylor
Laboratory Security and Regulations Governing Viral Pathogens
in a Post-Immunization Era, 116
Raymond H. Cypess, Frank P. Simione
5 MEDICAL INTERVENTION AND TECHNOLOGICAL
SOLUTIONS
The Polio Eradication Effort: Should Vaccine Eradication
Be Next?, 122
Vincent R. Racaniello
Antiviral Therapy in the Management of Post-Eradication
Infectious Disease Outbreaks, 127
Richard[J. Whitley
Potential Use of Cytokines and Antibody for Post-Exposure
Prophylaxis in the Post-Eradication Era, 129
Diane E. Griffin
The Potential Role of Probiotics and Microbial Ecology in Host
Defense, 133
Susanna Cun~zingham-Rundlles
121
6 THE CHALLENGES TO POST-ERADICATION OUTBREAKS 141
Ready or Not: The U.S. Health Care System and Emerging
Infections, 142
Kenneth D. Bloem
Vaccines for Post-Elimination Contingencies, 149
Thomas P. Monath
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CONTENTS
Strategic Priorities for Addressing Post-Eradication Outbreaks, 157
Robert P. Kadiec
Understanding the Public and Media Response to an Outbreak, 163
Ann E. Norwood
Post-Eradication Challenges in the Developing World, 169
Ellyn W. Ogdlen
APPENDIXES
A Glossary and Acronyms
B Workshop Agenda
C Forum Member and Speaker Biographies
Xl 1!
173
183
190
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Preface
The Forum on Emerging Infections was created in 1996 in response to
a request from the Centers for Disease Control and Prevention and the
National Institutes of Health. The goal of the Forum is to provide struc-
tured opportunities for representatives from academia, industry, profes-
sional and interest groups, and government] to examine and discuss scien-
tific and policy issues that are of shared interest and that are specifically
related to research and prevention, detection, and management of emerging
infectious diseases. In accomplishing this task, the Forum provides the
opportunity to foster the exchange of information and ideas, identify areas
in need of greater attention, clarify policy issues by enhancing knowledge
and identifying points of agreement, and inform decision makers about
science and policy issues. The Forum seeks to illuminate issues rather than
resolve them directly; hence, it does not provide advice or recommenda-
tions on any specific policy initiative pending before any agency or organi-
zation. Its strengths are the diversity of its membership and the contribu-
tions of individual members expressed throughout the activities of the
Forum.
Representatives of federal agencies serve in an ex officio capacity. An ex officio member
of a group is one who is a member automatically by virtue of holding a particular office or
membership in another body.
xv
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xv'
PREFACE
ABOUT THE WORKSHOP
The legacy of smallpox eradication has removed the worIdwicle suffer-
~ng caused by this disease, has resulted in yearly savings of substantial
financial resources that are no longer needed for its treatment and preven-
tion, and has helped build consensus and confidence to expand eradication
programs to other diseases. Since smallpox eradication, the science of eradi-
cation has changed and with it, our definitions of what diseases are possible
to eradicate. For example, many diseases, such as polio, measles, onchocer-
ciasis, dracunculiasis, lymphatic filariasis, leprosy, and Chagas diseases,
once thought not to be eradicable, are now targeted for elimination and
subsequent eradication.2 These and other disease control experiences pro-
vide strong evidence that with full implementation of an appropriate con-
tro! strategy, disease transmission can be effectively interrupted, if not elimi-
nated regionally and possibly eradicated globally.
Among the vaccine-preventable diseases, concerted efforts are under-
way to eliminate or eradicate several viral diseases. By 2002, it is antici-
pated that wild type poliovirus transmission will be interrupted worldwide.
The Pan American Health Organization (PAHO) in 1994 developed an
enhanced measles vaccination strategy with the goal of measles elimination
from the Western Hemisphere by 2000. While measles cases are still re-
ported, PAHO's measles elimination strategy has been very effective in
interrupting transmission and maintaining the absence of measles virus in
>99°/O of the 12,000 reporting municipalities in the Americas. The interrup-
tion of indigenous measles transmission in the Americas by the end of the
year 2001 remains an attainable goal.
The criteria for assessing eradicability of polio, measles, and other viral
infections have been debated extensively. What is specifically not addressed
are the relative desirability and feasibility, and the time required, for stop-
ping immunizations. With the elimination and eradication of several viral
diseases on the horizon, issues surrounding the cessation of immunization
activities become exceedingly important. Resolution of the issues affecting
when and how immunization and other prevention activities can be stopped
in conjunction with disease eradication are paramount to domestic and
2In 1997, the Dahlem Workshop on the Eradication of Infectious Diseases defined several
levels of deliberate efforts of disease control, including eradication, as follows: Control: re-
duction of disease incidence, prevalence, morbidity, and mortality to acceptable levels; Elimi-
nation of disease: reduction to zero incidence of disease in a defined geographic area; Elimina-
tion of infection: reduction to zero incidence of infection caused by a specific agent in a
defined geographic area; Eradication: permanent reduction to zero worldwide incidence of
infection caused by a specific agent; Extinction: the specific agent no longer exists in nature or
the laboratory. It is important to note that within the following authored papers there is some
inconsistency among the interpretations of these definitions.
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PREFACE
. .
XVl!
international public health agencies, pharmaceutical and vaccine manufac-
turers, and security analysts.
In an effort to better understand the dynamics of disease eradication
and post-immunization policies, the Institute of Medicine (IOM)'s Forum
on Emerging Infections hosted a two-day workshop (February 1-2, 2001)
on The Consequences of Viral Disease Eradication. Through invited pre-
sentations, pane! discussion, and open dialogue with workshop partici-
pants, we explored the principles underlying the biological challenges, medi-
cal interventions, and operational considerations for post-immunization
strategies for vaccine-preventable viral diseases, and highlighted important
efforts that may facilitate wise decision making.
ORGANIZATION OF WORKSHOP SUMMARY
This workshop summary report is prepared for the Forum membership
in the name of the editors, with the assistance of staff and consultants, as an
individually authored document. Sections of the workshop summary not
specifically attributed to an individual reflect the views of the editors and
not those of the Forum on Emerging Infections sponsors, or the Institute of
Medicine. The contents of the unattributed sections are based on the pre-
sentations and discussions that took place during the workshop.
The workshop summary is organized within chapters as a topic-by-
topic description of the presentations and discussions. Its purpose is to
present lessons from relevant experience, delineate a range of pivotal issues
and their respective problems, and put forth some potential responses as
described by the workshop participants. The Summary and Assessment
chapter discusses the core messages that emerged from the speakers' presen-
tations and the ensuing discussions. Chapter 1 is an introduction and over-
view of past disease eradication efforts and prospects for the future. Chap-
ters 2 to 6 begin with overviews provided by the editors, followed by the
edited presentations made by the invited speakers. Appendix A is a glossary
and list of acronyms useful to the reacler. Appendix B presents the work-
shop agenda. Forum member and speaker biographies are presented in
Appendix C.
Although this workshop summary provides an account of the indi-
vidual presentations, it also reflects an important aspect of the Forum
philosophy. The workshop functions as a dialogue among representatives
from different sectors and presents their beliefs on which areas may merit
further attention. However, the reader should be aware that the material
presented here expresses the views and opinions of those participating in
the workshop and not the deliberations of a formally constituted IOM
study committee. These proceedings summarize only what participants
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xvlt!
PREFACE
stated in the workshop and are not intended to be an exhaustive explora-
tion of the subject matter.
ACKNOWLEDGMENTS
The Forum on Emerging Infections and the IOM wish to express their
warmest appreciation to the individuals and organizations who gave valu-
able time to provide information and advice to the Forum through partici-
pation in the workshop e
The Forum is indebted to the IOM staff who contributed during the
course of the workshop and the production of this workshop summary. On
behalf of the Forum, I gratefully acknowledge the efforts led by Stacey
Knobler and Jonathan Davis, who dedicated much effort and time to devel-
oping this workshop's agenda and for their thoughtful and insightful ap-
proach and skill in translating the workshop proceedings and discussion
into this workshop summary. I would also like to thank the following IOM
staff and consultants for their valuable contributions to this activity: Leslie
Pray, Marjan Najafi, Laurie Spinelli, Judith Bale, Katherine Oberholtzer,
Paige Baldwin, Jennifer Otten, Brett Marvin, Clyde Behney, Bronwyn
Schrecker, Sally Stanfield, Francesca Moghari, Estelle Miller, and Beth
Gyorgy.
Finally, the Forum also thanks sponsors that supported this activity.
Financial support for this project was provided by the U.S. Department of
Health and Human Services' National Institutes of Health, Centers for
Disease Control and Prevention, and the Food and Drug Administration;
U.S. Department of Defense; U.S. Department of State; U.S. Agency for
International Development; U.S. Department of Veterans Affairs; Abbott
Laboratories; American Society for Microbiology; Bristol-Myers Squibb
Company; Burroughs WelIcome Fund; Eli Lilly & Company; The Ellison
Medical Foundation; Glaxo Welicome; F. Hoffmann-La Roche AG; Pfizer;
SmithKline Beecham Corporation; and Wyeth-Ayerst Laboratories. The
views presented in this workshop summary are those of the editors and
workshop participants and are not necessarily those of the funding organi-
zat~ons.
Joshua Lederberg, Chair
Forum on Emerging Infections