Fig. 1.

Flowchart of participant selection for ENSANUT 2022. We display the total number of participants surveyed per year (first row). The general population of our study is therefore comprised of participants ≥20 years old that completed the health questionnaire (second row), while the laboratory subset includes those with complete weights for venous blood and sampling stratum (third row). A subset of analyses was conducted in individuals with previously diagnosed COVID-19 and complete data (fourth row). This diagram was designed using resources created by Freepik from www.flaticon.com.