Harvard releases privacy-preserving agent tool for blood biomarker discovery, +4.18 AUC points median

Harvard · hf · 2026-10-07

Harvard researchers released a study and tool on Hugging Face: agentic discovery of blood biomarkers from distilled private health records. The core problem: evaluating candidate biomarkers requires private records that can't be shared with frontier LLM agents.

Approach: They distilled evidence from Clalit Health Services' panel of 5.4M+ patients into a releasable scoring tool — for each of 13 immune-mediated diseases, a graph attention network was trained inside the data boundary to predict the case-control AUC of candidate CBC expressions; only trained weights were released. The tool grounds an agent's propose-score-refine loop without exposing patient data.

Results: Agent-discovered expressions beat their literature-seeded starting points by a median of 4.18 AUC percentage points in external validation; reranking candidates from three frontier research tools improved on their first choices in most comparisons across three independent cohorts.

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