New pandemic before 2028?

- [2026-10-07] An active PHEIC remains in effect for the Bundibugyo ebolavirus outbreak in DRC (declared 16-17 May 2026); the DRC epidemic has not been declared over and is reported to be worsening, with MSF describing it as "escalated dramatically since early September" and spreading "like 'wildfire' across North Kivu," with over 8,100 confirmed cases and roughly 3,900-4,150 deaths. No "pandemic" or "pandemic emergency" determination has been made for this outbreak. https://www.doctorswithoutborders.org/latest/ebola-disease-outbreak-2026-how-msf-responding - [2026-08-25]/[2026-08-27] The Ebola outbreak in Uganda (same Bundibugyo strain) was declared over by WHO/Africa CDC after 42 days with no new confirmed case, so the PHEIC concern is now confined to DRC (and small imported cases in France/Kenya). https://africacenter.org/spotlight/ebola-drc/ - [2026-10-06/07] A single suspected pneumonic plague case tied to a lab worker in Irkutsk, Russia prompted quarantine of ~200 contacts in early October 2026; Russian authorities reported no spread, and WHO assessed "very low international risk," with no on-site expert request and no PHEIC-related action taken. https://polymarket.com/event/russia-pneumonic-plague-declared-public-health-emergency-byptptpt - [2026-06-10] CDC's latest global H5N1 summary (covering Aug 2025–June 2026) found 12 new human H5N1 cases (3 fatal) in Bangladesh, Cambodia and India, with "no person-to-person spread... identified in any of these cases," and the US public risk assessed as low. https://www.cdc.gov/bird-flu/spotlights/global-summary-06262026.html - [2026-01-15] WHO's weekly avian-influenza update (covering the Western Pacific Region) reported no new H5N1 human cases that week, with the global cumulative total (to Dec 2025) at 993 cases/477 deaths (CFR 48%), and no sustained human-to-human transmission documented. https://cdn.who.int/media/docs/default-source/wpro---documents/emergency/surveillance/avian-influenza/ai_20260116.pdf - [2026-05-17] Mpox remains under active WHO monitoring (situation reports through at least no. 66, data to 30 April 2026) but is not currently a PHEIC; the prior mpox PHEIC was ended in September 2025, before this market's window, and subsequent case counts (e.g., 1,066 confirmed cases globally in April 2026) have been well below the 2024 emergency peak. https://cdn.who.int/media/docs/default-source/_sage-2026/multi-country-outbreak-of-mpox--external-situation-report_66.pdf - [2026-09-25] At the second UN High-Level Meeting on Pandemic Prevention, Preparedness and Response (25 Sept 2026, New York), WHO Director-General Tedros stated outbreaks "anytime...pose a threat not only to local communities, but also to neighbouring countries and the world at large," citing the hantavirus outbreak aboard the MV Hondius as a recent example , but made no pandemic declaration; the meeting focused on political commitments and the unfinished Pathogen Access and Benefit-Sharing (PABS) annex. https://www.who.int/news/item/25-09-2026-world-leaders-renew-commitment-to-protect-the-world-from-future-pandemics - [2026-05-19] At WHA79, Tedros noted that Member States adopted the WHO Pandemic Agreement and the amended IHR entered into force, though consensus on the PABS annex had not yet been reached , confirming that as of mid-2026 the legal machinery for "pandemic emergency" declarations (introduced by 2024 IHR amendments) is in force but has never been invoked. https://www.who.int/news-room/speeches/item/who-director-general-s-address-to-member-states-at-the-79th-world-health-assembly---19-may-2026 - [2024-06-01/2025-09] Background: the 2024 IHR amendments created a new, higher "pandemic emergency" tier above PHEIC, defined by six cumulative criteria (wide/high-risk geographic spread, health-system strain, social/economic disruption, need for coordinated action); this tier entered into force in Sept 2025 but has not yet been used by the Director-General as of the latest reporting found. https://www.who.int/news-room/questions-and-answers/item/international-health-regulations-amendments - [2026-10-02] MSF's latest field update confirms the DRC Ebola outbreak is DRC's "largest and fastest-spreading Ebola outbreak ever recorded," with North Kivu driving new growth and treatment capacity insufficient — the most serious live PHEIC situation WHO is currently managing, but still short of a declared pandemic. https://www.doctorswithoutborders.org/latest/ebola-disease-outbreak-2026-how-msf-responding - [2026-10-08] WHO's emergencies dashboard and recent press material show no record of a WHO "pandemic" (nor a "pandemic emergency" under the new amended IHR category) being declared for any disease since market creation (2026-08-13) through today. https://www.who.int/emergencies/situation-reports NOT FOUND: No official WHO page or news release using the word "pandemic" in a formal declaratory sense (as opposed to PHEIC or the new "pandemic emergency" category) for any 2026 event; no evidence the amended IHR's "pandemic emergency" mechanism has ever been invoked; no confirmed human-to-human sustained transmission chain for H5N1 or H5N6 strains as of the latest data found (through June–September 2026). BOTTOM LINE: As of 2026-10-08 WHO has an active PHEIC for the worsening DRC Ebola (Bundibugyo) epidemic and is monitoring mpox and sporadic H5N1 cases, but it has not declared a "pandemic" or invoked the new post-2024 "pandemic emergency" tier for any disease since the market opened; nothing in the current emergency landscape (Ebola, mpox, H5N1, a single Russian plague case) shows imminent movement toward such a declaration before the 2027-12-31 deadline.

- [2020-03-11] On January 30, 2020, the WHO declared the novel coronavirus a public health emergency of international concern, and in March 2020, the WHO declared a pandemic. This is the only time in the 2007–2026 IHR era WHO has used the formal "pandemic" label (H1N1 2009 and COVID-19 2020 are the only two instances in roughly a century prior, per media trackers). https://www.cnbc.com/2020/03/11/who-declares-the-coronavirus-outbreak-a-global-pandemic.html - [2020-02-24] The World Health Organization no longer has a process for declaring a pandemic; a WHO spokesman said "There is no official category (for a pandemic)... WHO does not use the old phasing system that some people may be familiar with from 2009. Under the IHR, WHO has declared a public health emergency of international concern." This structural change makes a repeat formal "pandemic" declaration institutionally unlikely even in a severe outbreak. https://www.deccanherald.com/world/who-says-no-longer-uses-pandemic-category-but-virus-still-emergency-807649.html - [2024-ongoing] A pandemic is an epidemiological term that describes the global spread of a pathogen which WHO does not officially declare the start or end of; rather, WHO declares a PHEIC when an emergency is "serious, sudden, unusual or unexpected." Several PHEICs—most recently Mpox—have not related to pandemics, while several sustained global epidemics, such as the 7th cholera pandemic and HIV/AIDS, have not been assigned PHEIC status. WHO has previously declared six PHEICs, two of which are still ongoing: polio and mpox. This shows PHEIC (the live WHO mechanism) and "pandemic" declarations are distinct tracks, and PHEICs (6 since 2007, ~1 every 3 years) occur far more often than pandemic declarations (2 in ~100 years). https://www.gavi.org/vaccineswork/covid-19-no-longer-public-health-emergency-international-concern-does-mean-pandemic - [2026-01 present] Reference-class base rate: across the IHR era (2007–2026, ~19 years), only 2 of 6 PHEICs (H1N1 2009, COVID-19 2020) escalated to a "pandemic" label — roughly one true pandemic declaration per decade, though the mechanism for declaring one has since been discontinued, making future base rates lower than historical frequency suggests. https://www.mentalfloss.com/science/health/who-public-health-emergencies - [2024-05] Technically speaking, labeling something a pandemic has no immediate policy implications, and even the WHO does not formally declare pandemics anymore. Experts (including WHO's own pandemic/epidemic director) disagree on whether COVID-19 itself is "still" a pandemic, illustrating the term's ambiguity and WHO's reluctance to use it formally. https://time.com/6898943/is-covid-19-still-pandemic-2024/ - [2021-2026 Metaculus forecasts] Community forecasting platform Metaculus has run a multi-year "Pandemic Series": "Pandemic series: a major naturally-originated pandemic by 2026?" resolved with a 10% community chance (and ultimately resolved No), while "Will the WHO announce a non-H5N1 pandemic before 2027?" carried a 16.7% chance, and "before 2030?" carried an 18% chance. https://www.metaculus.com/questions/247/pandemic-series-a-major-naturally-originated-pandemic-by-2026/ - [ongoing] A separate Metaculus question specifically on the "before 2040" horizon shows "Will the WHO announce a non-H5N1 pandemic before 2040?" at 50% chance , implying forecasters see the ~2026-2027 window as substantially less likely than longer horizons — consistent with base rates being low per-year but cumulative over decades. https://www.metaculus.com/questions/43364/pandemic-in-2040/ - [2026-05-18] Current zoonotic flu risk assessment: FAO/WHO/WOAH assess the global public health risk posed by Gs/Gd-like high pathogenicity avian influenza (HPAI) A(H5) viruses as low, with risk of infection for occupationally or frequently exposed persons assessed as low to moderate. https://www.woah.org/app/uploads/2026/05/2026-05-18-fao-woah-who-h5-assessment.pdf - [2026-03/2026 period] Despite ongoing sporadic H5N1 human cases, the WHO said the overall risk to the general population remains low, noting sustained human-to-human transmission has not been reported and the overall public health risk from currently known influenza A viruses detected at the human-animal interface has not changed and remains low. https://www.cidrap.umn.edu/avian-influenza-bird-flu/who-reports-h5n1-death-among-variant-zoonotic-flu-cases-seen-year - [2024 analysis] Scientific commentary warns of elevated bird-flu pandemic risk given spread in mammals, but this is expert opinion/speculation, not an official WHO risk escalation: Scientists warn bird flu could spark a human pandemic in 2026 as bird flu has been rampaging through wildlife and farm animals worldwide. https://www.sciencefocus.com/news/bird-flu-2026-analysis NOT FOUND: No instance of WHO reviving a formal "declare a pandemic" mechanism since abandoning the six-phase system in 2009-2010; no current (post-August-2026) WHO statement indicating imminent pandemic declaration for H5N1, mpox clade Ib, or any other pathogen; no direct Polymarket-specific historical pricing (excluded per instructions). BOTTOM LINE: The historical/base-rate picture strongly favors "No": WHO has made a formal pandemic declaration only twice in the modern IHR era (H1N1 2009, COVID-19 2020) and has explicitly abandoned the procedural mechanism for doing so, now preferring PHEIC designations instead; independent forecaster communities (Metaculus) have assigned roughly 10-17% probability to comparable "pandemic before 2026/2027" questions, consistent with a low single-digit-to-teens annualized base rate for this ~15-month window.

YES means: the WHO Director-General formally declares a "pandemic" (or invokes the new post-2024 IHR "pandemic emergency" tier) for any disease between 2026-08-13 and 2027-12-31 11:59 PM ET. - [2026-05-17] At the moment WHO declared the Bundibugyo Ebola outbreak a PHEIC, it explicitly said the situation is serious but "does not currently meet the criteria for a pandemic emergency under the WHO's International Health Regulations." This confirms WHO is actively measuring this specific outbreak against the pandemic-emergency criteria rather than ruling the mechanism out — the closest real-world test case of the new tier to date. https://news.un.org/en/story/2026/05/1167542 - [2026-09-25] WHO's own Disease Outbreak News (DON618) states the DRC Bundibugyo epidemic "has rapidly evolved into a large and geographically expanding epidemic in the Democratic Republic of the Congo, with sustained transmission, high mortality and an increasing risk of further international spread," and is "the largest Ebola disease outbreak ever recorded in the Democratic Republic of the Congo irrespective of Ebola virus species." https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON618 - [2026-09-25] The same DON reports geographic expansion to a new province (Sud Ubangi) and a health zone (Dungu) "bordering South Sudan," bringing the outbreak to 63 health zones across seven of DRC's 26 provinces, which WHO says "increases the risk of cross-border transmission." https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON618 - [2026-10-04] WHO/Africa CDC's Weekly External Situation Report 21 states the outbreak has now extended to Kenya, described as "the fourth country affec…" (affected), after DRC, Uganda and earlier imported cases elsewhere — a fresh, un-tallied-by-colleagues expansion beyond the two countries covered in the original PHEIC declaration. https://afro.who.int/health-topics/ebola-disease - [2026-dated, pre-print] A Lancet Infectious Diseases modelling study quantified cross-border spillover risk using a 12-week stochastic hazard model: "Uganda 94·2% importation probability (19 confirmed cases as of June 4, 2026, including five health-care worker infections and two deaths); South Sudan 69·3%; Rwanda 8·6%; and Burundi 2·0%." Two of these four (Uganda, and now effectively Kenya) have already materialized, and South Sudan's ~69% modelled risk remains live — supporting the "wide/high-risk geographic spread to multiple States" prong of the pandemic-emergency definition. https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(26)00320-8/fulltext - [2026-10-05] CDC's current situation page still flags ongoing multi-country risk: "Frequent population movement and cross-border travel increase the risk of spread to Uganda, South Sudan, Rwanda, and to other areas." https://www.cdc.gov/ebola/situation-summary/index.html - [2026-09-23 data] As of the DON618 reporting date, DRC had confirmed cases across the country, with the outbreak expanding further and increasing risk of cross-border transmission , and separate Wikipedia tracking (updated ~Oct 7, 2026) puts cumulative confirmed cases at 8,625 with 4,151 deaths — scale now roughly matching entire national health-system strain criteria for a pandemic emergency. https://en.wikipedia.org/wiki/2026_Ebola_epidemic - [2024-06-01] Legally, the mechanism required for a YES resolution is already built and awaiting only a DG decision: the amendments added "pandemic emergency" as the ultimate level of alert... a pandemic emergency will be declared by the DG on the advice of an Emergency Committee composed of individual experts. No treaty ratification, new legislation, or Health Assembly vote is needed to trigger it — only a Director-General determination, which is a discretionary act that could occur with no further notice if DRC's indicators (health-system collapse, multi-country spread, economic disruption) continue to worsen. https://www.ejiltalk.org/the-entry-into-force-of-the-amendments-to-whos-international-health-regulations/ - [2024-06-01] The formal pandemic-emergency criteria explicitly include disruption that is already visible in DRC: "a communicable disease that has, or is at high risk of having, wide geographical spread to and within multiple States, exceeds or is at high risk of exceeding the capacity of health systems to respond in those States; causes, or is at high risk of causing, substantial social and/or economic disruption, including disruption to international traffic and trade." MSF and CDC reporting (cited by colleagues) of airport closures, flight restrictions, and insufficient treatment capacity already satisfies several of these elements in DRC alone. https://www.who.int/news/item/01-06-2024-world-health-assembly-agreement-reached-on-wide-ranging--decisive-package-of-amendments-to-improve-the-international-health-regulations--and-sets-date-for-finalizing-negotiations-on-a-proposed-pandemic-agreement - [2026-09-25] WHO's formal risk assessment (unchanged since 14 August 2026, reiterated in DON618) still separates risk tiers, rating the outbreak "very high" within DRC and "high" for countries sharing land borders with the Democratic Republic of the Congo — this is already the second-highest WHO risk category for any live event, one procedural step below a pandemic-emergency declaration. https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON618 BOTTOM LINE: The single most plausible YES path is not a new pathogen but the already-declared DRC Bundibugyo Ebola PHEIC escalating into the first-ever invocation of the amended IHR's "pandemic emergency" tier — WHO has already publicly measured this specific outbreak against that exact legal standard once (May 2026) and found it narrowly unmet, but the epidemic has since grown into DRC's largest-ever Ebola outbreak, breached a fourth country (Kenya, per the Oct 4, 2026 sitrep), and continues to raise its own stated "risk of further international spread," with no further legal or procedural barrier beyond a DG decision standing between current conditions and a YES resolution. NOT FOUND: No WHO statement since the May 2026 "does not meet the criteria" determination explicitly re-assessing the DRC outbreak against the pandemic-emergency criteria a second time; no confirmation of sustained local (non-imported) transmission in Kenya versus a single imported case; no official WHO Emergency Committee meeting scheduled to reconsider pandemic-emergency status for any disease as of 2026-10-08.

YES means: the World Health Organization Director-General formally declares any disease a "pandemic" (or invokes the new "pandemic emergency" IHR category) between 2026-08-13 and 2027-12-31 11:59 PM ET. - [2026-05-17/20] For the single most severe global outbreak during the market window, WHO's own Director-General explicitly stated "I determined that the situation was not a pandemic emergency, which is the new and highest classification under the amended International Health Regulations," and that the Emergency Committee "agreed that the situation is a public health emergency of international concern, but is not a pandemic emergency." https://www.who.int/news-room/speeches/item/who-director-general-s-opening-remarks-at-the-media-briefing-on-ebola-outbreak-in-drc-and-uganda-20-may-2026 - [2026-05-22] The first formal Emergency Committee statement codified this in writing: the outbreak "constitutes a public health emergency of international concern (PHEIC), but did not meet the criteria of pandemic emergency, as defined in the IHR." https://www.who.int/news/item/22-05-2026-first-meeting-of-the-ihr-emergency-committee-regarding-the-epidemic-of-ebola-bundibugyo-virus-disease-in-the-democratic-republic-of-the-congo-and-uganda-2026-temporary-recommendations - [2026-08-24/28] Four months later — despite the epidemic's continued rapid growth — the second Emergency Committee meeting reaffirmed the same non-pandemic determination: "the DG determined that the BVD epidemic in the DRC continues to meet the criteria of a public health emergency of international concern (PHEIC), but not those of a pandemic emergency." This shows the "pandemic emergency" bar is being applied consistently and is not simply a one-time snap judgment that could be revisited lightly. https://www.who.int/news/item/28-08-2026-second-meeting-of-the-ihr-emergency-committee-on-the-epidemic-of-ebola-bundibugyo-virus-disease-in-the-democratic-republic-of-the-congo---meeting-report - [2026-05-20] Even at the height of acute alarm (new strain, no vaccines/therapeutics, urban spread, healthcare-worker deaths), WHO's own global risk assessment stayed capped at "low": "WHO assesses the risk of the epidemic as high at the national and regional levels, and low at the global level." Since the pandemic-emergency definition requires risk "exceeding... capacity of health systems" with wide geographic spread across multiple states, a persistently "low" global-risk rating is a structural bar to reclassification. https://www.who.int/news-room/speeches/item/who-director-general-s-opening-remarks-at-the-media-briefing-on-ebola-outbreak-in-drc-and-uganda-20-may-2026 - [2026-05-19] Procedurally, the pandemic-emergency threshold is defined narrowly and cumulatively — "a pandemic emergency is a communicable disease that has, or is at high risk of having, wide geographical spread to and within multiple States, exceeds or is at high risk of exceeding the capacity of health systems to respond in those States; causes, or is at high risk of causing, substantial social and/or economic disruption, including disruption to international traffic and trade; and requires rapid, equitable and enhanced coordinated international action, with whole-of-government and whole-of-society approaches." All six criteria must be met simultaneously, a legally high bar that has not been triggered even by the DRC epidemic's worst month on record. https://www.who.int/news/item/01-06-2024-world-health-assembly-agreement-reached-on-wide-ranging--decisive-package-of-amendments-to-improve-the-international-health-regulations--and-sets-date-for-finalizing-negotiations-on-a-proposed-pandemic-agreement - [2025-07-19] A major structural headwind to any future "pandemic emergency" declaration gaining full international legitimacy: the United States has formally rejected the amendments to the International Health Regulations that introduced "a new category of 'pandemic emergency' for the most significant and globally threatening health crises" , meaning the US is not bound by this mechanism, which may make WHO leadership more cautious about invoking a tier one major power has already repudiated. https://www.newsonair.gov.in/u-s-formally-rejects-who-pandemic-amendments-citing-overreach-and-vague-provisions/ - [2018-10-17] Historical precedent for WHO's institutional caution: even in 2018, facing a serious DRC Ebola outbreak, the Emergency Committee's conclusion was that "a Public Health Emergency of International Concern (PHEIC) should not be declared at this time," illustrating a longstanding pattern of conservative, criteria-bound determinations rather than precautionary escalation — the same caution now evidently applied one level higher to "pandemic emergency." https://www.who.int/news/item/17-10-2018-statement-on-the-meeting-of-the-ihr-emergency-committee-on-the-ebola-outbreak-in-drc - [2026-05-22] Uganda's rapid epidemic control (no new cases after containment measures) within the same outbreak further reduced any multi-state "wide geographical spread" argument for pandemic-emergency status, reinforcing containment as the operative WHO narrative rather than uncontrolled global spread. https://www.who.int/news/item/22-05-2026-first-meeting-of-the-ihr-emergency-committee-regarding-the-epidemic-of-ebola-bundibugyo-virus-disease-in-the-democratic-republic-of-the-congo-and-uganda-2026-temporary-recommendations BOTTOM LINE: WHO has now had two explicit opportunities (May and August 2026) to invoke the new "pandemic emergency" tier for the single worst current outbreak and declined both times, citing unmet legal criteria and a persistently "low" global risk rating; combined with the discontinued classic "pandemic" declaration process, US non-adherence to the amended IHR, and no sustained human-to-human transmission in H5N1 or other watched pathogens, the resolution mechanism for this market has effectively never fired during the entire question window and shows no sign of firing before the 2027-12-31 deadline. NOT FOUND: No record of any WHO statement since August 2026 revisiting or escalating the DRC Ebola classification toward "pandemic emergency"; no evidence any other pathogen (mpox, H5N1, plague) has been formally assessed against the six pandemic-emergency criteria in 2026.