Objectives Objectives of this cross-sectional study include: i) to estimate prevalence, and investigate individual-level and country-specific determinants, of smoking, e-cigarette use, and exposure to SHS and to e-cigarette aerosol in selected European countries (WP3); ii) to analyze the attitudes, perceptions and behaviours of the adult European population towards policies to limit SHS exposure (WP3); iii) to compare selected smoking-related data collected through the TackSHS survey with those from a companion pan-European survey conducted in 2010 (WP3); iv) to assess morbidity and mortality from selected respiratory and cardiovascular diseases attributable to SHS exposure among adults and children in the European population (WP9); v) to quantify the economic burden associated to the exposure to SHS and e-cigarette aerosol in Europe (WP10).