https://filtermag.org/brexit-tobacco-harm-reduction/amp/

https://www.cochrane.org/news/updated-cochrane-review-shows-electronic-cigarettes-can-help-people-quit-smoking

https://www.planetofthevapes.co.uk/news/vaping-news/2021-05-04_world-leading-nhs-ecig-trial.html

https://news.psu.edu/story/653143/2021/04/12/research/e-cigarettes-cigarette-nicotine-delivery-reduce-exposure-carcinogen?utm_source=twitter&utm_medium=social&utm_term=research&utm_content=&utm_campaign=psu+official

https://www.forbes.com/sites/lizfarmer/2021/04/28/small-businesses-scrambling-to-figure-out-new-state-vaping-rules-and-taxes/?sh=5f5717366705