You said main outcome, not me. Cardiovascular stuff is really common, but it's a less common association: "breathing smoke makes lungs get sick" is easy to beli

You said main outcome, not me. Cardiovascular stuff is really common, but it's a less common association: "breathing smoke makes lungs get sick" is easy to believe. "breathing smoke makes brain leak" takes a little more knowledge. If you still have doubts, consider the prevalence of vaping. Sure vaping is healthier than smoking, but it's way way worse than not using nicotine in any form.