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Objective. To describe the design of the Mexican 2021 National Health and Nutrition Survey (Ensanut 2021). Materials and methods. The Ensanut 2021 is a probabilistic household survey that is part of the continuous Ensanut 2020-2024; survey outreach, sampling, measurement and logistic organization are described. Results. It is planned to obtain at least 12 060 complete household interviews and 9 837 samples to determine SARS-CoV-2 seropositivity at the national level. Conclusions. Ensanut 2021 will allow to estimate the seroprevalence of SARS-CoV-2 antibodies at regional and national level; also, it will accumulate information to make state inferences for the year 2024. [ABSTRACT FROM AUTHOR]

The lack of inflation indicators by income range in Curitiba motivated the development of an analysis methodology based on price index calculations published by the Brazilian Institute for Geography and Statistics (IBGE). The method employs National Broad Consumer Price Index (IPCA) data collected for the region of Curitiba and consumption structures from IBGE's Household Budget Survey (POF). The methodology proves itself to be of practical potential use as it permits interesting results to be obtained from 2020 inflation numbers for different income ranges. [ABSTRACT FROM AUTHOR]