Practical knowledge gained from firsthand observations of outbreak and epidemic responses can inform preparedness and response efforts for future public health crises. The public health response to infectious disease events such as the West Africa Ebola epidemic, the MERS outbreak in South Korea, and the emergence of Zika in South and Central America can inform our understanding of how an infectious agent is likely to cause a public health emergency and what can be done to prevent or respond to such events.

Though practical and operational knowledge gained during outbreak and epidemic responses are crucial for preparedness, the limited available public health and healthcare resources must be dedicated to performing response activities rather than conducting research on response activities. Observers external to the response are needed to capture and analyze the valuable, ephemeral data that are crucial for identifying challenges and improving operational response to future crises. During public health emergencies, direct knowledge of the challenges encountered and lessons learned during the response is typically limited to the minds of the government officials who are involved in day-to-day response activities. In the midst of a response, these individuals are, understandably, too busy to dedicate time to documenting and analyzing the operational knowledge and lessons they are observing. Often, is it not until after-action reports are compiled that responders have an opportunity to reflect on what they have experienced and learned. But after-action reports are often not produced until long after the response is over, which may be too late for other communities who wish to learn what they can do to prepare and improve their responses to similar crises. Additionally, after-action responses are typically critiques of a specific location’s or organization’s response and, therefore, tend to be focused on the response’s shortcomings rather than challenges inherent to infectious disease event response more broadly. These results may not be sufficiently generalizable to other communities’ preparedness needs.


Improve sharing of operational knowledge to strengthen preparedness

Independent, expert observations by non-governmental experts are critical for capturing ephemeral information that maybe overlooked by responders and, additionally, for providing an unbiased assessment of the problems faced and the resources required to combat them in both directly affected areas and other, yet-to-be-affected communities. Practitioners and researchers with valuable skill sets may lack the connections and resources to enable them to establish timely collaborations with communities affected by public health emergencies that would benefit both the affected communities as well as others. Typically, those who are able to participate in these types of investigations are a limited number of senior, and already well-funded, laboratory-based researchers. This small subset of researchers has made important discoveries in previous epidemics; however, knowledge of how to best respond to future public health crises would be improved by the participation of experts with a broader set of skills and experiences. 

Provide an independent assessment of the resources that are needed to prepare for and respond to outbreaks and epidemics

Government officials who are directly involved in the response may be viewed as having a stake in the problem and may be accused of being alarmist and/or trying to expand their authorities and resources to combat the problem. The Johns Hopkins Center for Health Security, on the other hand, is a well-respected, trusted, and independent voice for the importance of preparing for outbreaks and epidemics, and we can provide an unbiased, external assessment of the challenges faced during the response. We have a proven track record of advocating for policies to promote effective response to public health emergencies, and our ability to continue influencing policy and practice will be greatly enhanced by gathering anecdotes and stories from responders who can comment explicitly about their needs and lessons learned.


The Outbreak Observatory was created to support observation and analysis of the strategic and operational dimensions of public health crises. The project has funding to support our sending team members and trusted colleagues with relevant expertise to observe outbreak and epidemic responses from on the ground in affected areas and to share with practitioners and policymakers the challenges and successes that are likely to be experienced by communities in future events. Staff who are deployed will meet and speak with public health and healthcare practitioners at the local, state, regional, and national levels (as appropriate) to better understand the challenges they face, the resources they need, and the solutions they identify.

As a matter of priority, we aim to share our findings via rapid communication channels—e.g., communications with policymakers, social media, blog posts. Additionally, we will consider writing longer pieces—e.g., commentaries, articles—if we deem them to be an appropriate and necessary contribution to the literature. Information sharing is our goal. Academic publication is not our primary objective. The Outbreak Observatory team intends to work with domestic and international networks of practitioners and local partners to identify high-yield, field-based operational and applied research projects in order to generate new knowledge and a better understanding of the impacts of infectious disease events as well as the strategies that work best to mitigate their effects on health and society. We will share our findings with pertinent policymakers, members of the broader biosecurity and public health communities, and the public to ensure that important lessons are understood by all who need to know, especially those responsible for planning and resource allocation decisions.

Guiding Principles for Observers

First, do no harm

Ideally, our presence as observers will be seen as helpful to responders who want their hard work and stories shared with others. At the very least, we want to be an unobtrusive presence in any outbreak response. We recognize that, during emergencies, local practitioners are busy. We do not want our presence to, in any way, divert important resources from response activities.

Share only constructive and generalizable information

We will only share information that we believe is useful to the broader community of practitioners and policymakers. We will not criticize or “audit” any localities specific response; rather, we aim to collect and share information that is applicable to infectious disease incident response more broadly and that others can use to improve their own responses. We aim to gather information on challenges inherent to outbreak response, not to identify shortcomings of any particular response or organization. We will not share personally identifiable or protected health information.

Give credit where credit is due

We respect the intellectual property and specific contributions of practitioners and others involved in the local response. We have no interest in taking credit for their accomplishments and discoveries. Rather, we want to share best practices with our broad network of practitioners, policymakers, and academicians. Though academic publications are not our priority, any that arise from our involvement will be coordinated with local practitioners, and authorship will be assigned as appropriate.

Promote local capacity to publish

We believe it is important for local practitioners to share their stories. Ideally, local practitioners would serve as lead authors in developing academic articles about the operational challenges encountered and the lessons learned during their outbreak response. As Associate Editors of the academic journal Health Security, we have deep experience working with practitioners to develop or flesh out articles for publication in an academic journal, and we are happy to help local practitioners through this process. That being said, we also realize that practitioners are extremely busy and often do not have time to compose their own articles or work through the often-laborious process of submitting a manuscript for publication. In these cases, we are happy to lead the effort to document and publish pertinent findings in close collaboration with local co-authors.

Project Team

Project Team


Jennifer Nuzzo, DrPH, SM

Director, Principal Investigator
Senior Scholar, Johns Hopkins Center for Health Security

Dr. Nuzzo is a Senior Scholar at the Johns Hopkins Center for Health Security and Visiting Faculty in the Department of Environmental Health and Engineering and Associate in the Department of Epidemiology at the Johns Hopkins Bloomberg School of Public Health.

An epidemiologist by training, Dr. Nuzzo's work focuses on international and domestic biosurveillance, infectious disease diagnostics, and disease mitigation strategies. She also has worked on issues related to the Affordable Care Act, tuberculosis control, foodborne outbreaks, and water security and advised national governments and nonprofit organizations. Prior to joining the Center, Dr. Nuzzo worked as a public health epidemiologist for the City of New York, where she was a part of the city’s Waterborne Disease Risk Assessment Program.


Matthew P. Shearer, MPH

Project Manager
Senior Analyst, Johns Hopkins Center for Health Security

Mr. Shearer is a Senior Analyst at the Johns Hopkins Center for Health Security and a Research Associate in the Environmental Health and Engineering Department of the Johns Hopkins Bloomberg School of Public Health.

Mr. Shearer has a background in epidemiology and emergency preparedness and response, and his research at the Center includes developing health sector resilience to high-consequence infectious disease events, assessing the impact of the ACA on infectious disease surveillance and response capacity, and building regional collaboration on biosecurity issues in Southeast Asia. Prior to joining the Center, Mr. Shearer worked in local public health, conducting outbreak investigations and developing, exercising, and implementing emergency response procedures, particularly for infectious disease events.

Diane Meyer, RN, MPH

Lead Analyst
Senior Analyst, Johns Hopkins Center for Health Security

Ms. Meyer is a Senior Analyst at the Johns Hopkins Center for Health Security and a Research Associate in the Environmental Health and Engineering Department of the Johns Hopkins Bloomberg School of Public Health.

Ms. Meyer's background is in infectious diseases, public health, and nursing. Her research focuses on resilience to disasters and infectious disease events, public health policy, and global health security. Her current work involves creating a Global Health Security Index, improving health sector resilience to high-consequence infectious disease events, and determining best practices for communicating information about infectious diseases to the public. Prior to joining the Center, Ms. Meyer worked as a burn/trauma intensive care unit nurse in a level one trauma center in Washington, DC.


Michael Snyder, MA

Analyst, Johns Hopkins Center for Health Security

Mr. Snyder is an Analyst at the John Hopkins Center for Health Security and Visiting Faculty at the John Hopkins Bloomberg School of Public Health.

Mr. Snyder’s background is in international politics, and he has written on a wide range of topics in international affairs, including the use of geospatial technology by UN peacekeepers, democracy assistance by international organizations, and election violence prevention. He recently co-authored a report evaluating the UN Mission for Ebola Emergency Response in partnership with the Executive Office of the UN Secretary-General.

Prior to joining the Center, Mr. Snyder worked in health and humanitarian affairs and the Brian Urquhart Center for Peace Operations at the International Peace Institute, and he interned at the United Nations in the Department of Political Affairs. He served as Editor-in-Chief of the Tufts Observer as an undergraduate, and he is conversational in French and Arabic.


Divya Hosangadi, MSPH

Analyst, Johns Hopkins Center for Health Security

Ms. Hosangadi is an Analyst at the Johns Hopkins Center for Health Security and a Research Associate in the Environmental Health and Engineering Department at the Johns Hopkins Bloomberg School of Public Health.

Ms. Hosangadi has a background in epidemiology and vaccine policy. Prior to joining the Center, she worked at the World Health Organization and the Johns Hopkins International Vaccine Access Center, optimizing vaccine policy and assessing vaccine impact. Additionally, Ms. Hosangadi worked at the Johns Hopkins Center for American Indian Health managing active bacterial surveillance data collected on Native American reservations.

Ms. Hosangadi’s primary research interests include emerging infectious diseases, vaccine access and optimization, antimicrobial resistance, and public health policy and preparedness.


Marc Trotochaud

Research Assistant, Johns Hopkins Center for Health Security

Mr. Trotochaud is a Research Assistant at the Johns Hopkins Center for Health Security and an MSPH student in the department of Health, Behavior, and Society at the Johns Hopkins Bloomberg School of Public Health.

Mr. Trotochaud’s background is in communication studies and public health. His past research, work, and academic experience has addressed effectively communicating major public health problems to promote protective actions among dynamic populations. Prior to his time at the Center, Mr. Trotochaud worked with an array of public health agencies, ranging from local health departments to academic centers, applying his communication skills to address health-related challenges.

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Carolina Andrada

Intern Analyst, Johns Hopkins Center for Health Security

Ms. Andrada is an Intern Analyst at the Johns Hopkins Center for Health Security.

She is a Jack Kent Cooke Scholar pursuing a BA in International Studies with a concentration in Global Health Security at Johns Hopkins University. Her interests include health security, health policy, infectious diseases, and emergency preparedness, with a regional focus on the Americas.


Carlos Castillo-Salgado, MD, DrPH, JD

Senior Advisor
Professor, Johns Hopkins Bloomberg School of Public Health

Dr. Carlos Castillo-Salgado is a Professor of the Department of Epidemiology of the Bloomberg School of Public Health with joint appointments in the Department of Population, Family & Reproductive Health; the Department of Health Policy and Management; and the School of Medicine, Johns Hopkins University. He is also a Visiting Professor in most of the schools of public health in Latin America and Spain.

Dr. Castillo-Salgado pioneered the development of applied and field epidemiology training programs for public health professionals in the Americas, and he has occupied various technical and leadership positions during his 22 years of service at the Pan American Health Organization/World Health Organization. Currently, Dr. Castillo-Salgado is the Director of the Global Public Health Observatory of the Bloomberg School of Public Health and Director of the Certificate Training Program in Epidemiology for Public Health Managers.

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Noreen Hynes, MD, MPH

Senior Advisor
Associate Professor, Johns Hopkins School of Medicine & Johns Hopkins Bloomberg School of Public Health

As the Director of the Geographic Medicine Center of the Division of Infectious Diseases, Dr. Hynes focuses on clinical, public health, research and educational efforts at the clinical-public health interface in both tropical and temperate regions and resource constrained settings. Her research focuses on vaccine preventable tropical diseases (including vaccine clinical trials with the Center for Immunization Research), the epidemiology of tropical diseases among travelers and immigrants, and the epidemiology and control of emerging and reemerging infectious diseases, particularly high-consequence infectious diseases.

Dr. Hynes' educational endeavors include co-directing the Infectious Disease concentration of Bloomberg School of Public Health's Master of Public Health Program, serving as a faculty member for the Johns Hopkins Summer Institute of Tropical Medicine, and mentoring infectious disease fellows receiving additional training in clinical tropical diseases at the Johns Hopkins School of Medicine. She also provides clinical services as a member of the Johns Hopkins Hospital's Biocontainment Unit and directs the Johns Hopkins Travel & Tropical Medicine clinics.


Athalia Christie, MIA

Center for Global Health, US Centers for Disease Control and Prevention

Ms. Christie joined the CDC in 1997 as a Public Health Prevention Service Fellow focusing on lymphatic filariasis. She served her state assignment as the Coordinator of the Expanded Contact Investigation Unit at the New York City Tuberculosis Control Program where she oversaw more than 30 outbreak investigations. From there, she embarked on a series of international assignments including establishing acute flaccid paralysis surveillance in the tribal areas of Pakistan for the Global Immunization Division.

Ms. Christie was seconded to the World Health Organization from 2001-05 to lead the polio eradication programs in Somalia and South Sudan. In 2006, she was detailed to the American Red Cross to lead the Measles Initiative, providing technical and financial support to more than 75 countries. Most recently, she served as the Deputy Director for the Center of Global Health, overseeing policy, strategy, and communications for CDC’s $2 billion portfolio of global health programs operating in more than 60 countries. During this time, Ms. Christie deployed repeatedly to lead CDC’s Ebola response teams in Liberia and Sierra Leone.

Ms. Christie has received dozens of awards for her service including the Watsonian Public Health Advisor of the Year, the Secretary’s Award for Distinguished Service, and the American Red Cross’ Spirit of Excellence. Ms. Christie received her master’s degree from Columbia University.

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Lauren M. Sauer, MS

Assistant Professor, Johns Hopkins School of Medicine & Johns Hopkins Bloomberg School of Public Health

Ms. Sauer is an Assistant Professor of Emergency Medicine in the Johns Hopkins School of Medicine, with a joint appointment in the Center for Refugee and Disaster Response in The Johns Hopkins Bloomberg School of Public Health, and a doctoral candidate in health and public policy in the Johns Hopkins Department of Health Policy and Management, where she studies quality of aid in response to disasters and the effects of disasters on health care infrastructure. She is the current co-chair for the Society for Academic Emergency Medicine’s Disaster Interest Group, the Co-Director for the Johns Hopkins School of Medicine disaster course, and a Core Team Leader on the Johns Hopkins Go Team, a deployable Medical Asset.

Ms. Sauer has worked remotely and on the ground on several disaster responses including Hurricane Katrina, the 2009 California Wildfires, the Haiti earthquake and the Pakistan floods. She has spoken both nationally and internationally on a variety of disaster medicine topics and participated in the US Navy’s Continuing Promise missions in 2010 and 2011 and Pacific Partnership Mission in 2012.

Ms. Sauer is the Research Director of the Johns Hopkins Hospital's Biocontainment Unit, and she has worked in the field of disaster and public health emergency research and education for more than 10 years. Her current work focuses mainly on disaster and outbreak healthcare infrastructure, including rapid diagnostic systems and novel therapeutics in public health emergencies, clinical resource availability and access, and the impact of policy on preparedness and response capabilities.




Erica Neibaur

Intern Analyst
Intern, Johns Hopkins Center for Health Security

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Christopher Hurtado, MHS

Project Analyst
Analyst, Johns Hopkins Center for Health Security


Johns Hopkins Center for Health Security


Johns Hopkins Center for Health Security


The Johns Hopkins Center for Health Security works to protect people's health from the consequences of epidemics and disasters and to make communities more resilient to major challenges.

We examine how scientific and technological innovations can strengthen health security. We study the policies, organizations, systems, and tools to prevent and respond to outbreaks and public health crises. We advance policies and practice to address a range of challenges, including the global rise in emerging infectious diseases, a continued risk of pandemic flu, major natural disasters, our dependence on vulnerable infrastructure, outbreaks of foodborne illness, and the potential for biological, chemical, or nuclear accidents or intentional threats. 

The Center conducts independent research and analysis, and our work is supported by government and foundations. We do this work through the combined talents of our scholars in science, medicine, public health, law, social sciences, economics, and national security. We help connect diverse and international communities of health and science experts, industry leaders, and government officials to strengthen health security.



Open Philanthropy Project

This project is funded through support from the Open Philanthropy Project.