Today, an even greater risk than a naturally caused pandemic is that a non-government group will use open source AI tools to design a bioterrorism weapon.
Bill Gates
co-founder of Microsoft; chair of the Gates Foundation
In his January 2026 'Year Ahead' essay, Gates wrote that an even greater risk today than a naturally caused pandemic is that a non-government group will use open source AI tools to design a bioterrorism weapon.
Chair and Board Member, Gates FoundationPublished January 9, 2026 · date of remarks not establishedOptimism with footnotes
Context and checks
Surrounding words
In 2015, I gave a TED talk warning that the world was not ready to handle a pandemic. If we had prepared properly for the Covid pandemic, the amount of human suffering would have been dramatically less. Today, an even greater risk than a naturally caused pandemic is that a non-government group will use open source AI tools to design a bioterrorism weapon. The second challenge is job market disruption. AI capabilities will allow us to make far more goods and services with less labor. In a mathematical sense, we should be able to allocate these new capabilities in ways that benefit everyone.
What this quote does not say
- The passage gives no probability estimate and does not define which open source AI capabilities would suffice.
- The comparison is to naturally caused pandemics, not an explicit quantified casualty scenario.
How this was checked
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