The mesh size recommended by the WHO for protection against yellow fever, Zika virus, dengue fever or malaria in risk areas is at least 156 mesh (mesh = number of holes on an area of 1 square inch = 6.45 cm²).
- WHO (ed.) Insecticide-treated mosquito net interventions, status 2003, accessed on 27.05.2025, page 62
https://iris.who.int/bitstream/handle/10665/42685/9241590459_eng.pdf;sequence=1
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