The World Health Organization declares a new global pandemic before 2032.

Question

Six frontier AI models put this at 27% by 2 Nov 2036. Full reasoning from every model.

WillHappen.ai · Accepted Answer

27% — the median of 6 frontier models, resolving by 2036-11-02.

Answer

Gemini (Google): 22% — The call rests on whether respiratory zoonoses like H5N1 achieve sustained human-to-human spread before 2032. Centennial data shows major pandemics occur roughly every 20 to 30 years, giving an annual base risk around 3 to 4 percent. The WHO Director-General acts via IHR Emergency Committees, reserving formal pandemic terminology only for extreme global spread. Efficient mammal-to-mammal transmission confirmed in cattle or swine would abruptly double baseline surveillance alert levels.

Answer

Claude (Anthropic): 30% — Hinges on whether a novel pathogen achieves sustained human-to-human spread and WHO formally labels it a pandemic within ~10 years. Historically pandemics (true global, WHO-labeled) occur roughly once per generation (H1N1 2009, COVID-19 2020), giving a base rate near 15-25% per decade. Rising zoonotic spillover risk from H5N1 and other avian flu strains, plus dense global travel networks, pushes probability slightly above historical base rate. WHO has grown more cautious about declaring pandemics post-COVID political fallout, which could delay or soften formal declarations even if a qualifying event occurs.

Answer

GPT (OpenAI): 63% — It hinges on whether a high-severity, sustained cross-border outbreak triggers WHO’s political threshold for a formal pandemic label. WHO must first identify sustained international transmission and then its Director-General or member states must use an explicit pandemic designation. COVID-19 showed WHO can label a pandemic, but WHO’s 2023–26 framework favors PHEIC declarations rather than a standing automatic trigger. A novel influenza strain with efficient human transmission, especially H5N1 or H5N1-like, would sharply raise the odds before 2032.

Answer

Grok (xAI): 23% — A novel pathogen must achieve sustained H2H spread and trigger an official WHO pandemic label by end-2031. WHO issued pandemic declarations only in 2009 and 2020; 20th-century flu pandemics imply ~3% annual base rate. H5N1 mammalian spillover plus denser travel and surveillance lift the 5-year odds modestly above that base. A documented human cluster of H5N1 or a new sarbecovirus would most shift the forecast.

Answer

DeepSeek (DeepSeek): 62% — Turns on whether a novel pathogen with sustained human transmission emerges and outruns containment before 2036. WHO declared PHEIC for H1N1 in 2009, COVID-19 in 2020, and mpox twice; a new pandemic declaration requires a novel pathogen with sustained human-to-human spread. H5N1 has infected hundreds globally since 2020 with no sustained human transmission, but each spillover raises the chance of a reassortment event. The 10-year window is long enough that a pandemic-scale event is more likely than not, given roughly one pandemic per 20-30 years historically.

Answer

Qwen (Alibaba): 24% — H5N1 adaptation to sustained human transmission is the most plausible path, but that evolutionary leap remains the bottleneck. Base rate of ~1 pandemic per 18 years (1968, 2009, 2020) implies roughly 30% over any 6-year window, but WHO's high bar for formal pandemic designation pulls this down. H5N1 clade 2.3.4.4b is now endemic in US dairy cattle and spreading in mammals, raising spillover opportunity, yet no sustained human-to-human transmission has emerged… A novel coronavirus or influenza reassortant could emerge independently; the main mind-changer would be confirmed H5N1 human-to-human chains of 3+ generations.

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