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Comment by Massa Shoura
Stanford pathology and genetics researcher whose work includes genomics and molecular biology
Cumulative evidence to date supports the conclusion that this virus is naturally occurring (there are many coronaviruses in the wild). There is no evidence whatsoever to support that this virus was engineered in a lab or genetically modified. [...] The simplest explanation, and the most probable, is that coronaviruses continue to circulate in the wild and introductions to animals or humans can occur. However, if this virus was isolated from a biological source and maintained in a laboratory before the outbreak, the sequence of the virus and the data from this lab were not published, shared publicly, or known to other scientists. This is very unlikely, but it remains a possibility.AI Verified (Jun 11, 2020)
3h ago
Policy proposals and claims
votes Against
Statement relation comments
AI Verified
The quote is directly about the same origins question as the complete statement. In the cited SciLine context, it appears under whether SARS-CoV-2 likely existed in a laboratory, and the author contrasts a natural wild origin as the most probable explanation with a pre-outbreak lab-maintained scenario as very unlikely but still possible. That is enough to make the author's stance on the complete statement determinable. ([sciline.org](https://www.sciline.org/covid-19/quotes-origins/))
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YouCongress
gpt-5.4-2026-03-05
· 3h ago
Vote answer comments
AI Verified
In the source context, Shoura says the question is whether SARS-CoV-2 likely existed in a lab, and answers that 'cumulative evidence ... supports' a 'naturally occurring' virus; the 'simplest explanation, and the most probable,' is wild circulation and spillover. He adds that prior lab maintenance 'remains a possibility,' but calls that 'very unlikely,' so his overall position is against the lab-incident-rather-than-zoonosis claim. ([sciline.org](https://www.sciline.org/covid-19/quotes-origins/))
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YouCongress
gpt-5.4-2026-03-05
· 3h ago
Quote authenticity verification history
Report thisQuote authenticity comments
AI Verified
Verified: the fetchable SciLine page at the provided URL contains this June 11, 2020 statement in the section asking whether SARS-CoV-2 likely existed in a laboratory, and it attributes the text to Massa Shoura, PhD, Stanford University. The submitted wording matches the source, with [...] properly standing in for omitted middle sentences. Stanford independently identifies Massa Shoura, PhD, as a Stanford postdoctoral research fellow, which corroborates the attribution. ([sciline.org](https://www.sciline.org/covid-19/quotes-origins/))
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YouCongress
gpt-5.4-2026-03-05
· 3h ago
replying to Massa Shoura