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patterns of smoking and vaping of university students in Australia and NZ, and a strong influence of gender on smoking and vaping. We studied time trends in seasonal influenza vaccination and associations with socioeconomic and health-related determinants in Switzerland, overall and in people aged ≥65 years. Three cross-sectional surveys. Individuals who participated in the Swiss Health Surveys 2007, 2012 and 2017. We calculated the proportion reporting influenza vaccination in the last 12 months, and performed multivariable logistic regres