An NFHS question shows why questionnaires need to be reworked and updated from first principles

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Evidently, Yorkool International Trading Company is based in Tianjin, China, and competes in the Indian mosquito net market with brands such as Dawa Plus, Duranet, Lifenet, Olyset, Permanet, Royal Sentry, Magnet and many others..

We discovered this because the questionnaire used for the National Family Health Survey (NFHS) 2019-20 suggests that your brand preference is an important question being pondered upon by policymakers...

To quote NFHS-5, 'An important strategy in the control of malaria and kala-azar is prevention through use of mosquito nets to protect themselves from mosquito bites..

The proportion of households having at least one ITN for every two persons who slept in the household last night is highest in Nagaland (43%), Arunachal Pradesh (35%) and Mizoram (26%).' Not surprisingly, poorer households (lowest wealth quintile) use ITN nets more than richer households (highest wealth quintile)..

It's a bit odd, then, that NFHS asks no questions about use of these other methods, though localised surveys show people use repellents much more than they use nets..