O-17 - None of 457 animal-source samples from the Huanan market tested positive for SARS-CoV-2
The animal samples were collected weeks after the 1 Jan closure and removal of live animals, so they could not include the live susceptible wildlife that had been on sale; see the argument that this negative is uninformative rather than exculpatory.
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Why this is evidence
A wildlife-origin market spillover (H-14) prima facie predicts some infected animals at the market; a human/cold-chain-seeded amplifier (H-15) predicts animal samples negative. All-negative animal sampling is prima facie against H-14 relative to H-15 — but the samples post-date removal of the live animals (attached caveat), which neutralizes it.