Redefining the Wash Resistance Index to predict insecticidal durability of mosquito nets.

Key Points

• Improving the prediction of insecticidal durability allows for longer-lasting mosquito nets and better malaria control.
• The analysis indicates that excluding the first wash from the wash resistance index (WRI) enhances its predictive ability for durability.
• A new metric, the wash-off rate index (WORI), intuitively expresses the average wash-off across initial washes.
• Understanding production and storage effects can refine assessment techniques for mosquito net longevity.