Literature Review: Systematic Review of Work Medicine

I was wondering if they actually do blood work during those occupational health screenings you have to go through when enrolling in high school? Specifically, I'm curious if there's any way for them to tell from a blood test that I'm a smoker.

If anyone has some solid, verified info on this, I’d really appreciate it. 😁 👍👍

Of course you can... Honestly, the very first thing they’re gonna see on those blood work results is whether or not you've been lighting up, so there's no hiding it. You really ought to quit messing around with those cigarettes if you don't want your doctors catching onto you during your next checkup at the Mayo Clinic.