O-32 - Market-unlinked December cases lived even closer to the market than market-linked cases
Surprising and load-bearing: the people with no known market connection were the ones living nearest the market, which the authors use to argue the clustering is not simply an artifact of investigators preferentially finding market-linked cases.
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Why this is evidence
If the clustering were an artifact of investigators preferentially finding market-linked cases (H-19), market-linked cases should sit nearest the market; unlinked cases lying even closer is against H-19 and for a genuine market focus (H-14/H-15).