Every outbreak you've ever heard about passed through the same system. Whether it was Ebola in West Africa, COVID-19 in Wuhan, or Mpox in the DRC, the World Health Organization's reporting infrastructure determined when the world found out and how fast governments responded. Understanding that system tells you exactly where you sit in the information chain.
What is the WHO Disease Outbreak News?
WHO Disease Outbreak News (DON) is the organization's official channel for publishing verified reports about acute public health events worldwide, covering everything from individual country outbreaks to multi-nation epidemics. Each DON report includes confirmed case counts, geographic scope, pathogen identification, WHO risk assessment, and recommended public health measures.
WHO published 49 DON reports in 2024 alone, covering pathogens ranging from avian influenza H5N1 to Marburg virus to Oropouche fever. Each report follows a standardized format: situation summary, epidemiology, WHO risk assessment, and WHO advice. Reports are free and publicly accessible at who.int/emergencies/disease-outbreak-news.
DON is not a real-time feed. Reports are published after WHO has verified the event through official government channels and, in most cases, after laboratory confirmation. That verification process is what makes DON authoritative. It's also what makes DON slow compared to informal sources like ProMED.
How does an outbreak get reported to WHO?
Under the International Health Regulations (IHR) of 2005, all 196 signatory countries are legally obligated to report certain disease events to WHO within 24 hours of assessment. A country must notify WHO when it detects an event that may constitute a Public Health Emergency of International Concern, using a decision instrument that evaluates factors like unusual severity, unexpected geographic spread, and risk of international transmission.
The real-world process looks like this. A national health authority identifies an unusual disease cluster through its own surveillance network. Laboratory confirmation follows when possible. If the event meets IHR criteria, the country's IHR National Focal Point contacts WHO's regional office, which routes the notification to WHO headquarters in Geneva.
Not every country reports promptly. The 24-hour requirement is a legal obligation, but enforcement is essentially nonexistent. During the early stages of the 2014 Ebola outbreak in West Africa, Guinea didn't notify WHO until March 2014 despite cases appearing as early as December 2013. Three months of delay cost thousands of lives. Countries sometimes delay reporting for economic or political reasons, fearing travel restrictions, trade impacts, or reputational damage.
IHR 2005 also requires countries to develop core surveillance and response capacities. As of 2024, WHO's own assessments show that roughly 40% of countries still lack full core capacity. Gaps in laboratory infrastructure, trained epidemiologists, and electronic reporting systems mean that outbreaks in lower-income countries take longer to reach WHO's desk.
What is a PHEIC and when does WHO declare one?
A PHEIC (Public Health Emergency of International Concern) is the highest alarm WHO can sound. It is a formal declaration that a disease event poses a risk to other countries through international spread and requires a coordinated global response. Only the WHO Director-General can declare a PHEIC, based on recommendations from an Emergency Committee of international experts, and the declaration triggers specific obligations under international law.
Since the IHR framework was revised in 2005, WHO has declared seven PHEICs:
- 2009: H1N1 influenza pandemic. Estimated 151,000-575,000 deaths globally in the first year.
- 2014: Polio resurgence. Wild poliovirus detected in countries previously declared polio-free.
- 2014-2016: Ebola in West Africa. 28,616 cases and 11,310 deaths across Guinea, Liberia, and Sierra Leone.
- 2016: Zika virus. Rapid spread across the Americas, linked to microcephaly.
- 2018-2020: Ebola in DRC. 3,481 cases and 2,299 deaths in North Kivu and Ituri provinces.
- 2020-2023: COVID-19. Declared January 30, 2020; ended May 5, 2023. Over 7 million confirmed deaths.
- 2022-2023: Mpox. Declared July 23, 2022; ended May 11, 2023. Re-declared August 14, 2024 for Clade Ib.
Not every serious outbreak becomes a PHEIC. WHO's Emergency Committee considers whether the event is extraordinary, whether it poses a public health risk through international spread, and whether it requires a coordinated international response. The 2024 Marburg outbreak in Rwanda, despite its 83% case fatality rate, did not trigger a PHEIC declaration because containment was swift and cross-border spread was limited.
How fast does WHO actually publish?
WHO's publication speed varies dramatically depending on the country's reporting capacity, the complexity of laboratory confirmation, and political factors. Best case, you see a DON report within 24-48 hours of WHO being notified. Worst case, weeks pass between initial reports and official WHO publication.
Rwanda's September 2024 Marburg outbreak is the gold standard for speed. Laboratory confirmation came on September 27, WHO was notified the same day, and a DON report published on September 28. One day from confirmation to global alert.
COVID-19 was slower. ProMED reported the unusual Wuhan pneumonia cluster on December 30, 2019. WHO received official notification from China on December 31. But the first DON report didn't publish until January 5, 2020, and it took until January 12 for WHO to confirm novel coronavirus identification. Twelve days from first signal to confirmed pathogen identification in official channels.
ProMED consistently beats WHO to the punch. That's by design. ProMED accepts unverified reports from clinicians and researchers on the ground, while WHO waits for government confirmation. Both approaches serve a purpose. ProMED gives you the earliest possible signal; WHO gives you the verified fact. If you're monitoring for pandemic preparedness, you want both.
How does PandemicAlarm use WHO data?
PandemicAlarm pulls WHO Disease Outbreak News reports through automated scraping, extracts structured data from each report (pathogen, location, case counts, dates, WHO risk assessment), and combines it with data from CDC, ProMED, ECDC, and other sources to generate a unified severity score and geographic mapping for each active outbreak event.
Our pipeline runs daily. When a new DON report publishes, PandemicAlarm ingests it within hours, not days. We parse the semi-structured text of each DON report to extract quantitative data that WHO embeds in narrative paragraphs rather than structured databases. Case counts, death tolls, affected regions, date ranges, pathogen subtypes: all of this gets pulled into our system and displayed on the PandemicAlarm map.
Raw WHO data has gaps. DON reports are written as narrative documents, not data feeds. Case counts are sometimes reported as ranges or approximations. Geographic specificity varies from country-level to district-level depending on the report. PandemicAlarm normalizes these inconsistencies so you get a clean, comparable view across all active events.
By combining WHO's authority with ProMED's speed and our own severity scoring, PandemicAlarm gives you something no single source provides on its own: a fast, verified, actionable picture of global outbreak activity.