The Architecture of Global Viral Safety: The Evolving Role and Responsibilities of the World Health Organization in the Prevention and Control of Epidemics and Pandemics
The World Health Organization (WHO), established in 1948 as a specialized agency of the United Nations, plays a fundamental and unique role in the global architecture for virus control and the prevention of pandemics and epidemics. With a constitutional mandate to act as the guiding and coordinating authority in international health work, the organization has transformed from a primarily technical advisory body to a central player in global security governance. This report analyzes the extensive tasks and responsibilities of the WHO, ranging from the legal frameworks of the International Health Regulations (IHR) to the operational depth of the Strategic Health Operations Centre (SHOC) and the innovative mechanisms of the Pandemic Accord adopted in 2025.
Constitutional Mandate and the Definition of Public Health
The foundations of the WHO are anchored in a holistic view of health, defined in the constitution as a state of complete physical, mental, and social well-being, and not merely the absence of disease or infirmity. This broad perspective is essential for addressing viral threats, as epidemics affect not only physical health but also disrupt social structures and economic stability. The constitution assigns the WHO the task of promoting cooperation among states, providing technical assistance in emergencies, and establishing international standards for biological and pharmaceutical products.
The legitimacy of the WHO derives from its universal membership, with 194 member states determining the policies and priorities of the organization through the World Health Assembly (WHA). This democratic structure enables the organization to set norms that are binding on the international community, a power that is crucial in managing cross-border viral outbreaks.
Functional Responsibilities according to the Constitution
Article | Description of Duties | Relevance to Viruses and Pandemics |
Article 2(a) | Acting as the directing and coordinating authority on international health. | Centralization of information and response during global outbreaks such as COVID-19. |
Article 2(g) | Encouraging and promoting work for the eradication of epidemic and endemic diseases. | Campaigns for vaccination, use of antibiotics, and improvement of diagnostics. |
Article 2(s) | Establishing and revising the international nomenclature of diseases.9 | Standardization of definitions for new viral variants and disease presentations.12 |
Article 2(u) | Developing and promoting international standards for biological and pharmaceutical products.9 | Quality control and prequalification of vaccines and diagnostic tests.13 |
The International Health Regulations (IHR): The Legal Framework
The primary instrument available to the WHO for managing viral threats is the International Health Regulations (IHR), originally adopted in 1969 and fundamentally revised in 2005 following the SARS crisis.14 The IHR (2005) provides a legally binding framework for 196 countries to prevent, control, and respond to the international spread of diseases.16
Core obligations of Member States and the WHO under the IHR
Under the IHR, states are required to develop core capacities for the detection, assessment, and reporting of events that may pose a risk to global public health.16 This requires robust surveillance systems at local, regional, and national levels, as well as at international points of entry such as airports and seaports.16
The WHO has the responsibility to maintain a global early warning system and to support countries in building these capacities.16 In the event of a potential outbreak, the WHO must verify information, even if it comes from unofficial sources, and conduct a risk assessment in collaboration with the affected member state.16
The Public Health Emergency of International Concern (PHEIC)
A crucial task of the Director-General of the WHO is to declare a "Public Health Emergency of International Concern" (PHEIC). A PHEIC is defined as an extraordinary event that poses a risk to the health of other states through international spread and that potentially requires a coordinated international response.
Criteria for PHEIC | Description |
Severity | Is the impact of the event on public health severe? |
Unusualness | Is the event unusual or unexpected? |
International Spread | Is there a significant risk of spread across borders? |
Trade and Travel | Is there a significant risk of restrictions on international traffic or trade? |
When a PHEIC is declared, the Director-General issues temporary recommendations based on the advice of an Emergency Committee of independent experts. These recommendations, while not legally binding in terms of enforceability, provide the scientific and political basis for national measures such as travel advisories, screening protocols, and vaccination strategies.
The 2024 Amendments: Strengthening Preparedness
In June 2024, the World Health Assembly adopted a package of amendments to the IHR to institutionalize the lessons learned from the COVID-19 pandemic. These changes, which will come into effect in September 2025, mark a shift from a purely technical instrument to a framework that also addresses the political and economic aspects of preparedness.
One of the most notable changes is the introduction of a new alert level: the "Pandemic Emergency." This level applies to a PHEIC caused by a communicable disease that has a broad geographic reach, threatens to overwhelm health system capacities, and causes significant socioeconomic damage. This enables the WHO to demand an even higher degree of international coordination and funding.
Other important amendments include:
Equity: A strengthened obligation for the WHO to facilitate access to health products during a crisis.
Financing mechanism: The establishment of a coordinating financial mechanism to help developing countries finance their IHR core capacities.
National IHR authorities: The obligation for countries to designate specific entities responsible for implementing the IHR at the national level.
The Pandemic Accord of 2025: A New Global Contract
In parallel with the IHR amendments, member states have negotiated a new Pandemic Accord, which was adopted in May 2025. This accord, drafted under Article 19 of the WHO constitution, aims to address the deeper structural shortcomings in the global response to viral threats, with a specific focus on equity, prevention, and the One Health approach.
The Pathogen Access and Benefit-Sharing (PABS) System
One of the most controversial and simultaneously crucial components of the agreement is the PABS system. This system is designed to resolve the tension between sharing pathogen materials and the resulting benefits. Countries agree to share pathogen samples and genetic sequence data (GSD) quickly through the WHO. In return, manufacturers using this data must contractually commit to providing a percentage of their production (with a guideline of 
, of which 
as a donation and at affordable prices) to the WHO for distribution based on public health needs.
The One Health approach and Primary Prevention
The Pandemic Agreement recognizes that approximately 
of emerging infectious diseases originate in animals. Therefore, the agreement requires member states to adopt a One Health approach, integrating the health of people, animals, and ecosystems. This includes strengthening surveillance at the human-animal interface to prevent zoonotic "spillovers" before they become a human epidemic.
Article Pandemic Agreement | Focus Area | Objective |
Article 4 | Prevention and Surveillance | Reducing the risks of viral spillover and improving early detection. |
Article 5 | One Health | Integration of human, veterinary, and environmental surveillance. |
Article 9 | Research and Development | Promoting sustainable investments in R&D for pandemic-related products. |
Article 12 | PABS System | Fair distribution of vaccines and diagnostics in exchange for pathogen data.6 |
Article 13 | Logistics Network | Establishment of a global network for the distribution of medical goods.7 |
Surveillance and Monitoring: Global Vigilance
The WHO manages a complex web of surveillance systems that serve as the eyes and ears of global public health. These systems are essential for identifying new viral strains and monitoring the spread of known diseases.12
The Global Outbreak Alert and Response Network (GOARN)
GOARN is a partnership of more than 600 institutions worldwide, coordinated by the WHO, that mobilizes technical expertise and resources for epidemic surveillance and response to international emergencies.31 The network brings together clinicians, epidemiologists, and social mobilization experts to ensure a rapid, multidisciplinary response to outbreaks.31
The Global Influenza Surveillance and Response System (GISRS)
For influenza, one of the most persistent viral threats, the WHO maintains the GISRS network.32 This system continuously collects samples of influenza viruses worldwide to determine which strains should be included in the annual vaccines and to monitor viruses with pandemic potential (such as avian influenza H5N1).33
Innovative Surveillance Methods
The WHO is expanding its surveillance arsenal with modern techniques:
Environmental surveillance: Testing wastewater for pathogens such as SARS-CoV-2 and poliovirus, which serves as an early indicator of community spread before clinical cases are reported.12
Collaborative Surveillance: An integrated approach to bring together data from various sectors (human, animal, environment) for a holistic view of infection risks.12
Unity Studies: A standardized framework for rapid epidemiological investigations during an outbreak to directly assess the transmission rate and severity of a new virus.32
Surveillance System of Attacks on Healthcare (SSA): The systematic collection of data on violence against healthcare, which is essential for maintaining healthcare systems during outbreaks in conflict areas.12
Research and Development: The R&D Blueprint
One of the most critical tasks of the WHO is to coordinate research on viruses for which there are currently insufficient medical countermeasures. The WHO R&D Blueprint is a global strategy to accelerate the development of vaccines, diagnostics, and therapies for priority pathogens.13
Pathogen Prioritization
The WHO regularly conducts a scientific process to determine which viruses pose the greatest threat. In 2024, more than 200 scientists from 54 countries evaluated a total of 1,652 pathogens, spread across 28 virus families and one bacterial group.35 This process is intended to prevent "pandemic myopia" by looking not only at individual known viruses but at entire families that may pose a risk.35
Priority Pathogens (Examples) | Reason for Prioritization |
Ebola and Marburg | High mortality and potential for large-scale epidemics.18 |
MERS-CoV and SARS-CoV | Severe respiratory illnesses with proven pandemic potential.13 |
Zika virus | Risk of neurological complications and rapid geographical spread.12 |
Pathogen X | An unknown pathogen that could cause a severe international epidemic.35 |
The R&D Blueprint has shown that timelines for vaccine development can be shortened from over a decade to less than a year, provided there is global coordination and shared data.13
Operations and Logistics: The Strategic Response
On the front lines of a viral outbreak, WHO transforms into an operational machine. The organization not only provides advice but also manages complex logistical operations to support countries overwhelmed by a virus.5
The Strategic Health Operations Centre (SHOC)
The SHOC in Geneva serves as the command center of WHO. It monitors global health events 24/7 and facilitates international collaboration during emergencies.5 When a significant outbreak is detected, the SHOC activates an Incident Management System (IMS) to mobilize personnel and resources.5
Operations Support and Logistics (OSL)
The OSL unit is responsible for the physical supply chain of WHO. In a globalized market where goods can become scarce during a pandemic, WHO aggregates demand to create market power and ensure fair distribution.38
The OSL manages, among other things:
The Dubai Global Logistics Hub: A 20,000 square meter facility where medical supplies are stored for immediate shipment worldwide.5
Interagency Emergency Health Kits (IEHK): Standardized packages of medicines and materials for tens of thousands of people.38
Treatment centers: Expertise in designing and setting up isolation units for Ebola or cholera.38
In 2022 alone, the OSL provided 
million in personal protective equipment (PPE), diagnostics, and clinical equipment to 188 countries.38
Logistical Deployment Statistics (2022)
Product Category | Units Delivered/Value | Impact Area |
Ambulances | 121 vehicles | Patient transport in Ukraine and Pakistan.38 |
Cholera kits |
| Response to outbreaks in Africa and Asia.38 |
Trauma/Surgical kits |
| Support in conflict areas.38 |
COVID-19 Supplies |
| Global support for healthcare systems.38 |
kits (for 
treatments)
kitsThe Global Health Emergency Corps (GHEC): Human Capital
The most advanced systems are effective as long as there are trained professionals to operate them. In May 2023, WHO launched the Global Health Emergency Corps (GHEC) to strengthen the personnel capacity for pandemic response.40
The GHEC is a framework that connects expertise in ministries and agencies worldwide. It aims to create:
Connected Leaders: A network of national health experts trained to work with international frameworks.42
Surge Capacity: Interoperable teams that can be rapidly deployed in affected countries.42
Frontline Health Workers: Investments in community workers and surveillance experts at the local level.41
This initiative recognizes that, while national sovereignty is essential, no country can protect itself against a viral threat without an international ecosystem of experts.
Funding and the Political Economy of Health
The implementation of the WHO's extensive tasks is hindered by the way the organization is funded. A significant portion of the budget (planned at 
billion for the period 2026-2027) consists of earmarked voluntary contributions from member states and private actors such as the Gates Foundation. This funding structure has raised concerns about the organization's independence and the fragmentation of the global health architecture.
With the amendments to the IHR and the new Pandemic Accord, the WHO is trying to achieve more predictable and equitable funding:
The Pandemic Fund: Already supported by billions in commitments to finance national preparedness in poor countries.
The Coordinating Financial Mechanism: Intended to mobilize resources for the specific needs of developing countries in implementing the IHR core capacities.
Public-Private Partnerships: While these are essential for innovation, the WHO emphasizes the need to prioritize public interests over profit maximization in the distribution of vaccines.
Influenza: A Continuing Focus through the PIP Framework
The approach to influenza often serves as a blueprint for managing other viruses. The Pandemic Influenza Preparedness (PIP) Framework, adopted in 2011, is a unique instrument that links the exchange of influenza viruses with pandemic potential to access to vaccines and other benefits.
The PIP Framework requires manufacturers receiving influenza viruses from the WHO network to contribute to global preparedness, either through annual financial contributions (Partnership Contributions) or by reserving production capacity for the WHO during a pandemic. In 2025, the WHO strengthened these efforts through the High-Level Implementation Plan III (HLIP III), which focuses on enhancing laboratory capacities and improving preparedness for respiratory pathogens in general.
Challenges and Critical Reflections
Despite its central role, the WHO faces significant challenges. Geopolitical tensions affect countries' willingness to share information and grant the WHO access to their territory for research into the origins of viruses. Moreover, some countries, such as the United States under specific administrations, have questioned their membership or funding, undermining the stability of the organization.
Criticism of the WHO often focuses on:
Speed of Action: The sluggishness in declaring a PHEIC in the early stages of an outbreak, such as with COVID-19.
Enforcement Authority: The WHO's inability to compel member states to comply with IHR obligations, as the organization lacks direct sanctioning powers.
Equity: The ongoing inequality in access to vaccines, with wealthy countries hoarding supplies while poor countries remain vulnerable.
Conclusions and Future Perspectives
The role of the WHO in the era of pandemics has evolved into that of a global architect of safety. Its tasks are no longer limited to medical expertise but include managing complex legal treaties, coordinating global supply chains, and navigating the geopolitical interests of its 194 member states.1
The implementation of the 2024 IHR amendments and the 2025 Pandemic Agreement presents a historic opportunity to make the global health architecture fairer and more effective.15 However, the core responsibility of the WHO remains the protection of the most vulnerable through scientifically grounded policies and international solidarity.2 In a world where viral threats travel faster than ever before, the WHO is the only entity capable of forging fragmented national responses into a coherent global shield.3 The ultimate effectiveness of the organization will, however, always depend on the political will and financial support of its member states.4
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