known_biases - The ~155 early-case locations were assembled from WHO-mission summaries plus indirect/leaked/court-obtained fragments, not an official raw line list (China withheld the case-level line lists), so the set is vulnerable to ascertainment bias toward market-linked cases in how cases were found and reported; a 2024 Science erratum corrected a distance-calculation error in it. Anything resting on this compile (its centrality claim and any re-test of it) shares that ascertainment/collection bias.