Hair follicle tests are the only accurate way to know what is going on. It will detect THC for up to well, however long you grew your hair.. If the testers want to get REALLY finicky about it, they can actually determine approximate "times" of use (approximate, but reasonably so.)
THC in urine is a weird process. it depends on how heavy your usage, your metabolism, and a host of other factors. Also if you used a THC vape ONE time, and got sick there will be no THC showing up in your system AT ALL, unless a blood test was done between, I think 3--9 hours of use. Saliva is medium-- within the past few days.
All your body processes will filter THC separately and like, if you were not a habitual user, it may not even show up in your hair, although hair is still going to be the best bet for some people.
DESPTIE multiple ideas on the web, well, no you can't shave your head, boil it in tar, dye it 35 times, and/or dip it in goats urine, If you shave prepare to be a "professional swimmer" too because they will find other areas of hair to test.
People who are dying should be forthcoming in my opinion. What do you have to lose? You are about to die, honesty is probably the best bet if you believe in some sort of afterlife, or even the GOOD of society. That's my opinion. Of course, I imagine the initial reports were like, hoping to get over it OH ALTHOGH not being forthcoming to your doctor about what you have INHALED with lung issues strikes me as pretty dumb. Of course, so is buying black market cartridges..
Anna