The BaseNewsThe Guardian

Could AI ‘change the stakes’ in the development of bioweapons?

The Guardian's science editor explains, after the MI5 chief's warning, how AI might help terrorists and states build bioweapons. Experts quoted say AI mainly amplifies existing expertise, while materials, tacit know-how and facilities remain barriers. One expert calls for independent pre-release evaluations and restricted biological data.

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Why it matters

The same thing, for different readers.

What it means for you

Chatbots could give some dangerous biology information, but the experts quoted say making a weapon still needs materials, equipment and hands-on skill that a chatbot does not supply.

For lawmakers

One expert says no country has formal policies against AI misuse for biology, and urges independent model evaluations before release, restricted pathogen data and mandatory-style screening of DNA orders.

For researchers

Experts distinguish amplification of skilled teams, the nearer concern, from uplift to novices; dual-use work such as AI-designed viruses makes intent hard to tell from legitimate research.

In their own words

Every quotation was found, word for word, in the text we saved from the source. That shows the words are there; it does not make them true, or prove the speaker meant them as quoted.

From the source’s own text.

“Here, AI does not remove the need for expertise, it amplifies expertise that is already there”
Filippa Lentzos, reader in science and international security, King's College LondonOn well-resourced organisations and nation states, which the speaker describes as the more immediate concern than unskilled groups.
Found word for word in the sourceAs quoted in the text we read, not the speaker’s own text or a transcript of their words
“If you have access to material and facilities capable of producing them, then AI is not going to make too much difference if you want to do harm.”
Martin Pačesa, professor, University of ZurichArguing that access to biological material is the critical barrier, using a nuclear-weapons comparison.
Found word for word in the sourceAs quoted in the text we read, not the speaker’s own text or a transcript of their words
“We have no formal government policies in place in any country yet to protect against this kind of misuse”
Tom Inglesby, director, Johns Hopkins Center for Health SecuritySaid while describing AI companies' steps against bioweapons misuse, most of which are not announced.
Found word for word in the sourceAs quoted in the text we read, not the speaker’s own text or a transcript of their words

The record

Questions
How is AI used in attacks, defence and war? · Are AI companies putting stronger safeguards into practice?
People
Ian Sample (Wrote it, Science editor, The Guardian) · Ken McCallum (About them, head of the UK's intelligence service, MI5) · Filippa Lentzos (Speaks, reader in science and international security, King's College London) · Tom Inglesby (Speaks, director, Johns Hopkins Center for Health Security) · Martin Pačesa (Speaks, professor, University of Zurich) · Sonia Ben Ouagrham-Gormley (Mentioned, deputy director of the biodefense programme, George Mason University) · David Relman (Mentioned, Stanford University researcher)
What we read
We read the whole source.
Found by
The Radar, run of October 15, 2026, via the-guardian-ai (tier 2: a major outlet’s own reporting)
Cite this
The Guardian, “Could AI ‘change the stakes’ in the development of bioweapons?”, October 14, 2026. Entry in the Ctrl AI Base, https://ctrlai.com/base/guardian-2026-10-14-ai-change-stakes-bioweapons
Our notesIncludes a paragraph on Anthropic's September report of five cases of possible misuse of Claude; that report is described second-hand and was not checked. Lentzos is quoted in the article.