WHO Prequalification of Vector Control Products updated on 2 June 2026 Module 5 – Long-term community studies for ITNs (Implementation guidance of August 2025, revised 2 June 2026). ITNs must show durability and entomological efficacy under about 36 months of routine use, with chemical–physical analyses and semi-field efficacy at months 0, 12, 24 and 36.
Main points
- Document: Implementation guidance (Module 5), Long-term community studies for ITNs; updated 2 June 2026 (Figure 1 aligned with Table 6 on appearance/WRI test timepoints).
- Core expectations: community acceptability and durability (median functional survival not less than two years at study end); fabric chemical–physical consistency at baseline, 12, 18, 24 and 36 months; comparable entomological efficacy via non-inferiority analysis on operationally aged nets at 0, 12, 24 and 36 months.
- Listed threats to validity include unsuitable communities, high loss to follow-up, inappropriate design, non-compliance with GLP/ISO 17025, inadequate sample size, overlapping ITN campaigns, and low mosquito density (semi-field).
- These are WHO prequalification expectations for ITN products, not Vietnam’s rules for household/public-health insecticide product registration.
VPMA’s note
This is technical guidance from WHO PQT/VCP. Members who make or import nets, or follow international standards, may find it useful; it does not replace Vietnamese Ministry of Health texts.
- Source
- WHO PQT/VCP – Long-term community studies for ITNs
- Updated
- 2 June 2026
- Section
- New approaches to insect control
- Module
- Module 5 – LTCS
Editorial note: This is a short summary and comment by VPMA, not a full copy. The original text and copyright belong to the source cited. The WHO page has no photograph; this is a mosquito photo already on the Association website.
Source: WHO PQT/VCP – Long-term community studies for ITNs (summarised in English by VPMA). Read the Vietnamese page.