Private Doubts Among 'Proximal Origin' Authors Contrast with Public Dismissal of Lab Origin, New Documents Confirm

Cardiologist Peter McCullough's recent claims on the Joe Rogan Experience echo documented discrepancies in the early scientific response to SARS-CoV-2 origins. McCullough referenced Fauci's emails and the 2020 Nature Medicine paper 'The Proximal Origin of SARS-CoV-2,' arguing it served as a 'cover-up manuscript' despite authors privately assigning non-negligible probabilities to a lab origin.

The paper, authored by Kristian Andersen and colleagues including Eddie Holmes, concluded that laboratory manipulation was improbable. However, released emails and Slack messages reveal initial concerns. Andersen emailed Fauci on January 31, 2020, noting features that 'potentially look engineered' and that the genome appeared 'inconsistent with expectations from evolutionary theory.'

A February 1, 2020, conference call organized by Jeremy Farrar involved Fauci, Francis Collins, and the authors. Subsequent drafts shifted emphasis, with Farrar suggesting edits to describe lab scenarios as 'improbable' rather than 'unlikely.'

Newly released 2026 Slack messages from the authors, disclosed by Sen. Rand Paul, show persistent private doubts post-publication. Andersen assigned a 30% probability to lab origin; Holmes estimated 20%, later revised to 10%. Andersen wrote of 'smoking(ish) guns' regarding the furin cleavage site and 'less confidence' in the paper's strong public stance.

These communications also indicate coordination with NIH and intelligence community reviews. While authors have testified that their views evolved through standard scientific analysis without external pressure, the gap between private assessments and the paper's confident public conclusion has fueled ongoing scrutiny.

Additional context includes Peter Daszak's role via EcoHealth Alliance and WHO investigation preferences, as noted by McCullough. The monoclonal antibody discussion aligns with FDA authorizations limiting use to non-hospitalized patients.