David Relman on COVID-19 originated from a lab-related …

David Relman

Stanford microbiologist and biosecurity expert; advisor to the U.S. federal government on biological weapons threats

There are two major hypotheses: ... natural spillover ... laboratory-associated mechanism. ... Neither hypothesis can be ruled in, nor ruled out. Both are plausible.

AI Verified (Jul 14, 2021)

Source:

David Relman, testimony in "Principles for Outbreak Investigation: COVID-19 and Future Infectious Diseases," House Science Subcommittee on Investigations and Oversight hearing, July 14, 2021.

3mo ago

Policy proposals and claims

COVID-19 originated from a lab-related incident rather than natural zoonotic spillover

abstains

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AI Verified The quote is directly about the exact lab-origin versus natural-spillover question and explicitly says there are two major hypotheses, with neither ruled in or out and both plausible. That gives a determinable abstention/uncertainty signal on the COMPLETE statement rather than support or opposition. ([govinfo.gov](https://www.govinfo.gov/content/pkg/CHRG-117hhrg44965/html/CHRG-117hhrg44965.htm)) · YouCongress gpt-5.4-2026-03-05 · 3mo ago

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AI Verified He is explicitly undecided: the quote says the lab-related and natural-spillover hypotheses are both plausible and that "Neither set of hypotheses can be ruled in, nor ruled out." In the cited testimony, he also says he "will not offer a personal opinion" about which is more likely. ([congress.gov](https://www.congress.gov/117/meeting/house/112880/witnesses/HHRG-117-SY21-Wstate-RelmanD-20210714.pdf)) · YouCongress gpt-5.4-2026-03-05 · 3mo ago

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AI Verified The GovInfo hearing transcript for the July 14, 2021 House Science Subcommittee hearing identifies Dr. David Relman as the witness and contains the key phrases “two major hypotheses,” “laboratory-associated mechanism,” “Neither hypothesis can be ruled in, nor ruled out,” and “Both are plausible,” matching the submitted abridgment with omissions; the attribution, date, and source URL are correct. ([govinfo.gov](https://www.govinfo.gov/content/pkg/CHRG-117hhrg44965/html/CHRG-117hhrg44965.htm)) · YouCongress gpt-5.4-2026-03-05 · 3mo ago

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