# Mass deworming (MDA)

**Intervention ID:** `int_deworming`  
**Evidence strength:** moderate  
**Causes:** `cause_deworming`

## Mechanism

Periodic anthelmintic treatment.

## Organizations in this catalog

- `org_unlimit_health`
- `org_sightsavers`
- `org_evidence_action_deworm`
- `org_evidence_action`

## Citations (public evaluator pages)

- https://www.evidenceaction.org/programs/deworm-the-world
- https://www.givewell.org/charities/top-charities

## Evidence notes

Former GiveWell top-charity lineage via Evidence Action Deworm the World / related programs; Phase 1 left $/life null without a current Top Charities cite.

## Key uncertainties

- Not currently listed among GiveWell Top Charities on the Top Charities page (fetched 2026-10-01).
- Long-term income evidence and CE remain contested in the broader literature; do not invent current GiveWell $/life.

## Fungibility notes

Deworming often co-funded with governments; without a current GiveWell grant page citation here, fungibility left qualitative.

## Cost-effectiveness notes (do not treat as verified without citation_urls)

Former GiveWell top lineage; Phase 1 $/life null without current cite.

Agents must look up `data/claims_index.json` and cite `citation_urls` before stating numbers.

## Provenance

See `docs/evaluation-provenance.md` and `data/graph/evaluations_graph.json`.

_last_reviewed: 2026-10-01_