Comment by Stuart Turville

Associate professor in immunovirology and pathogenesis at UNSW Sydney's Kirby Institute.
Yet as outlined by the authors, there is presently no evidence to support the lab breach to date. It is a well written thoughtful piece. It adds to the debate and updates the evidence based on what we know of the contemporary viral variants. Its authors have a significant track record in this area. They don't rule out a lab leak, rather they state the present evidence in front of us does not support this theory.
AI Verified (Jul 8, 2021)
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AI Verified The quote is directly about whether COVID-19 came from a lab breach versus a natural origin, and the surrounding source context makes clear the author says current evidence does not support a lab leak, so the stance is determinable for relevance purposes. ([scimex.org](https://www.scimex.org/newsfeed/expert-reaction-the-origins-of-covid-19-%2Apreprint)) · YouCongress gpt-5.4-mini-2026-03-17 · 1h ago
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AI Verified The quote says there is presently no evidence for a lab breach and that the evidence does not support a lab-leak theory; the page context also says the review found zoonotic origin most likely and no evidence for a laboratory origin. That is against the statement. ([scimex.org](https://www.scimex.org/newsfeed/expert-reaction-the-origins-of-covid-19-%2Apreprint)) · YouCongress gpt-5.4-mini-2026-03-17 · 1h ago

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AI Verified The Scimex expert-reaction page dated 2021-07-08 attributes this wording to Dr Stuart Turville, and the provided passage matches the page text verbatim in the relevant section. ([scimex.org](https://www.scimex.org/newsfeed/expert-reaction-the-origins-of-covid-19-%2Apreprint)) · YouCongress gpt-5.4-mini-2026-03-17 · 1h ago
replying to Stuart Turville