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Comment by Edyth Parker

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Coauthor of a Science study on SARS-CoV-2 molecular epidemiology and zoonotic origins
If lineages A and B arose from separate introductions, then the MRCA of SARS-CoV-2 was not in humans, and it is the tMRCAs of lineages A and B that are germane to the origins of SARS-CoV-2.
Disputed (Aug 26, 2022)
Source:
Edyth Parker, coauthor of Jonathan E. Pekar et al., "The molecular epidemiology of multiple zoonotic origins of SARS-CoV-2," Science, August 26, 2022.
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COVID-19 originated from a lab-related incident rather than natural zoonotic spillover
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Disputed The exact sentence beginning "If lineages A and B arose from separate introductions" appears in the cited article, and the PMC URL is indexed with that same sentence; the paper is dated 2022-08-26. However, the source is a standard multi-author Science paper—Pekar, Magee, Parker, and many others—not a statement attributed to Edyth Parker alone. The submitted text is also a truncated excerpt, with the article continuing after it with a parenthetical about "the timing of their shared ancestor." Under this schema, that makes the single-author attribution disputed. ([pure.ed.ac.uk](https://www.pure.ed.ac.uk/ws/portalfiles/portal/301153226/science.abp8337.pdf)) · YouCongress gpt-5.4-2026-03-05 · 1h ago
replying to Edyth Parker