EpiStack

O-31 - Both lineage A and lineage B early cases cluster near the Huanan market

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Properties8
type
observation
id
O-31
statement
Lineage-B December cases (n=11) had a median distance of 8.30 km to the market (p=0.017), and the two earliest-known lineage-A cases were near the market (one at 2.31 km, p=0.034; the other staying at a hotel within ~500 m), so both viral lineages independently cluster near the market.
link_state
linked
source
S-17 - Worobey et al. 2022 Science — geolocated case map naming the Huanan market the early epicenter
locator
Results, lineage-stratified spatial analysis
data_basis
quote
Lineage B cases (n=11): median distance 8.30 km (p=0.017)... Lineage A cases (n=2): first case resided 2.31 km from market (p=0.034)

The lineage-confirmed subsets are small (n=2 and n=11) and the p-values near threshold (0.034, 0.017); a 2024 erratum corrected the null-generation procedure. The claim rests on both independently-introduced lineages centring on the same market.

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