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This paper provides a comprehensive update on the data collection issues for all five waves of NFHS and a detailed discussion of the allied quality concerns with a special focus on the most recent round, NFHS-5. More specifically, we have examined certain aspects of data collection, including the size of the questionnaire, duration of the interview, fieldwork organisations, quality checks for certain outcomes, and overflow and non-utilisation of the data. In the last five rounds, the size, dimensions, and utility of NFHS data have grown phenomenally. Concerns related to the quality of data have increased with the increase in the size of the survey. A considerable rethinking and effort is still required in the selection of survey organisations, sample size, and the number of questions.