On December 30, 2019, a ProMED moderator posted a report about an unusual cluster of pneumonia cases in Wuhan, China. WHO received its official notification from China the next day. Media coverage for most of the world came weeks later. ProMED subscribers had a head start measured in days at first, then weeks as the story unfolded. That pattern wasn't an accident. It's how ProMED has operated since 1994, and it's why the platform remains one of the fastest outbreak detection tools on the planet.

What is ProMED and who runs it?

ProMED (the Program for Monitoring Emerging Diseases) is a moderated internet-based reporting system operated by the International Society for Infectious Diseases (ISID) that collects, curates, and distributes reports of infectious disease outbreaks and toxin exposures from around the world. Anyone can submit a report. Not everything gets published. That distinction is what makes ProMED valuable.

Founded in 1994 by virologist Jack Woodall and a group of colleagues who recognized that official disease reporting channels were too slow, ProMED started as a simple email list. It predates WHO's current Disease Outbreak News system. For over three decades, it has operated on a straightforward model: local observers, including physicians, veterinarians, public health workers, and even informed members of the public, submit reports of unusual health events. A team of expert moderators reviews each submission, adds context and commentary, and publishes those that meet editorial standards.

The moderation team is the backbone. ProMED's moderators are subject-matter experts in infectious disease, epidemiology, and veterinary medicine drawn from institutions worldwide. They don't just pass along reports. They contextualize them. A raw report of "unusual deaths among poultry in Vietnam" becomes a ProMED post with species identification, geographic specificity, links to prior events in the region, and a moderator's assessment of whether this could signal avian influenza spillover.

ProMED is free. You can subscribe at promedmail.org and receive reports by email. The archive is searchable. No paywall, no institutional affiliation required.

Why does ProMED beat official channels?

Speed comes from skipping the verification bottleneck. WHO waits for government confirmation before publishing Disease Outbreak News. Governments wait for laboratory confirmation. Laboratories wait for specimens. ProMED publishes when a credible observer reports something unusual, which can happen days or weeks before that full chain completes.

Three structural advantages explain the speed gap:

No government approval required. Under the International Health Regulations, countries are supposed to notify WHO within 24 hours of identifying a potential public health emergency. In practice, governments sometimes delay for political or economic reasons. China's slow disclosure of SARS in 2003 is the textbook case. ProMED doesn't need any government's permission to publish. If a clinician in Guangdong posts about an unusual respiratory syndrome, ProMED's moderators can publish it within hours.

Crowd-sourced detection. ProMED's network reaches into hospitals, veterinary clinics, and public health offices in over 180 countries. That breadth means signals emerge from the periphery of the global health system, the small clinics and rural hospitals where unusual cases first appear, not just from capital-city reference laboratories.

Dual human-animal surveillance. Many emerging pathogens jump from animals to humans. ProMED monitors veterinary reports alongside human disease reports, catching signals that purely human-focused systems miss. Avian influenza events in poultry, unusual bat die-offs, and livestock disease clusters all get posted and analyzed. WHO's human health mandate means animal signals can fall through the cracks of official reporting until a human case is confirmed.

What has ProMED caught first?

The track record speaks clearly.

SARS (2003). On February 10, 2003, ProMED published a report about an unusual outbreak of acute respiratory syndrome in Guangdong Province, China. WHO didn't issue its first global alert on SARS until March 12. ProMED's early warning gave subscribers a month of lead time before the outbreak became international front-page news.

COVID-19 (2019-2020). ProMED's December 30, 2019 post about the Wuhan pneumonia cluster came before WHO's official notification and well before most global media coverage. Subscribers who acted on that early signal had weeks to prepare before the pandemic response began in earnest.

Ebola in Guinea (2014). ProMED flagged unusual hemorrhagic fever cases in Guinea's Forest Region in March 2014, contributing to early international awareness of what became the largest Ebola outbreak in history. Official WHO confirmation followed, but ProMED's report helped accelerate the recognition that this wasn't a routine event.

H5N1 avian influenza. ProMED has consistently reported avian influenza events in poultry and wild birds before official veterinary or WHO notifications, including multiple events across Southeast Asia, Egypt, and more recently, detections in US dairy cattle.

Not every ProMED report turns into a major outbreak. Most don't. The value is that when a major outbreak does emerge, ProMED has usually flagged it first.

How does PandemicAlarm use ProMED data?

PandemicAlarm ingests ProMED reports as one of several data streams feeding our severity scoring and mapping system. When ProMED publishes a report of an unusual event, our pipeline captures it, extracts location and pathogen data, cross-references it against WHO and CDC reports, and flags discrepancies or confirmations.

ProMED often provides the first signal. WHO provides the verification. By combining both, PandemicAlarm gives you speed without sacrificing accuracy. When a ProMED report appears for a region with no corresponding WHO DON report, we mark the event as "unverified" on the map. When WHO confirms it, the event's status updates and the severity score firms up.

For users monitoring the PandemicAlarm map, ProMED-sourced events appear as early indicators. A new dot on the map sourced from ProMED tells you something is developing. An event confirmed by WHO tells you it's real. Both pieces of information matter.

Should you subscribe to ProMED directly?

If you're serious about early outbreak awareness, yes. ProMED sends 5-15 emails per day on average, covering events worldwide. Most are routine. Scanning subject lines takes 30-60 seconds. You'll quickly learn to recognize which reports warrant a full read and which are background noise.

Volume can feel overwhelming at first. Start by reading only reports tagged for your geographic region or for pathogens you care about most. ProMED's subject lines include the disease name and country, so filtering is simple. Over a few weeks, you'll develop a sense of the baseline and start noticing when something breaks the pattern.

ProMED reports are written for a professional audience, but the core information is accessible. You don't need to understand every virological detail. You need to notice when a moderator's commentary includes phrases like "unusual," "not previously reported in this region," or "warrants further investigation." Those phrases are ProMED's way of flagging that something might be significant.

Pair ProMED with PandemicAlarm and you have both the raw signal and the processed intelligence. ProMED gives you the first word. PandemicAlarm gives you the scored, mapped context that tells you what it means. For background on how WHO's official reporting compares, see our posts on how WHO tracks outbreaks and our pandemic preparedness guide.