O-29 - 923 Huanan-market environmental samples yielded 73 SARS-CoV-2 positives (3 isolates), with positives clustering at aquatic-cold-chain-meat vendor stalls
The same China-CDC Huanan-market environmental sampling campaign later released metagenomically and re-analysed by S-35 (Crits-Christoph) and S-39 (Bloom) — hence D-1. Positives concentrate on surfaces of product-selling stalls and drains/sewers. The report frames the contamination as “compatible with introduction of the virus through infected people, infected animals or contaminated products”, and its conclusion leans to human shedding.
Link to original
Why this is evidence
Positives concentrating at aquatic/cold-chain/meat stalls rather than the wildlife stalls fits an externally-introduced (cold-chain or human-shed) amplifier (H-15) better than a live-wildlife spillover concentrated at wildlife stalls (H-14).