Association between tobacco advertising policies, health warning mandates and adolescents' exposure to tobacco advertising and warning labels in 80 countries.

Background: Implementation of tobacco advertising, promotion and sponsorship (TAPS) bans and of health warning mandates varies by country, and their impact on adolescents' exposure to tobacco-related messages is not well understood, particularly in low-income and middle-income countries.

Aim: To explore the association of the implementation of TAPS bans and health warning mandates with the proportion of adolescents exposed to tobacco advertisements and health warnings in 80 countries from 2016 to 2021.

Methods: The proportion of 11-17 years old exposed to tobacco advertising was assessed using Global Youth Tobacco Survey data (80 countries, n=428 347).

Dual and poly-nicotine and tobacco use among adolescents in the United States from 2011 to 2022.

Background: Adolescent nicotine and tobacco product use remains common despite declining smoking rates in the United States, likely due to the emergence of novel products. Concurrent use of multiple products may increase the risk of nicotine dependency and subsequent substance use.

Aim: To identify patterns and trends of dual and poly nicotine and tobacco use among adolescents in the US and explore associations of dual and poly nicotine and tobacco use with sociodemographic factors.