# Insecticide-treated nets (ITNs)

**Intervention ID:** `int_itn`  
**Evidence strength:** exceptionally_strong  
**Causes:** `cause_malaria`, `cause_global_health_life_saving`

## Mechanism

Distribute long-lasting insecticide-treated nets.

## Organizations in this catalog

- `org_amf_drc_2027`
- `org_nothing_but_nets`
- `org_global_fund_malaria`
- `org_gates_malaria`
- `org_givewell_top_charities_fund`
- `org_against_malaria_foundation`
- `org_unicef_malaria`

## Citations (public evaluator pages)

- https://www.givewell.org/charities/amf
- https://www.givewell.org/charities/top-charities

## Evidence notes

GiveWell rates evidence of impact for mass ITN distribution as exceptionally strong; many high-quality studies consistently find strong impact (AMF review; Top Charities page).

## Key uncertainties

- Duration of protection from ITNs and insecticide resistance in GiveWell-funded locations (GiveWell AMF review).
- Uncertainty about AMF post-distribution monitoring correspondence and net durability vs independent literature (GiveWell AMF review).
- Limited published data on other funders’ non-net costs for AMF-supported campaigns (GiveWell AMF review).

## Fungibility notes

GiveWell adjusts for the chance other malaria funders would fill ITN gaps without AMF; AMF tracks Global Fund/PMI spending to assess genuine gaps (GiveWell AMF review).

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

GiveWell 2022-2024 avg ~$5500/life; ~$6/net (AMF).

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_