Australian adolescents' knowledge of smoking harms and misperceptions about tobacco products: a cross-sectional study.

Objective: To assess adolescents' baseline knowledge of smoking health harms scheduled to be covered in future graphic health warnings (GHWs) and inform the content of future tobacco control public communication campaigns.

Methods: Cross-sectional survey of 8631 secondary school students (mean age=14.5 years) in Australia in 2022/2023 (weighted n=8655).