Teen vaping gender‑gap reversal

National cohort data (PATH, 2014–2024) show that since about 2021 adolescent girls — especially ages 15–17 — have become more likely than boys to be regular e‑cigarette users. The reversal is modest in absolute terms but persistent, and authors note self‑report likely makes these estimates conservative. — If sustained, the trend changes who public‑health campaigns, clinical screening, and regulatory scrutiny should prioritize — shifting resources and messaging toward older teen girls and investigating gendered marketing and social drivers.