I haven't really been sick in the last few years, but I always smoked at least a little when I was sick. It made me less miserable overall even if it was hard on my lungs to take a hit. Vaping is certainly easier to do than smoking if you've got a bad cough, but it's your decision.

Vaping too much or too hard/fast can surely affect your lungs, but it's nowhere as bad as smoke. I got to where smoke was so bad on my lungs I was ready to quit using mj completely. Discovering vapor has given me a new lease on the 'high life'.

I usually set my Vapolution to 11 or 12 o'clock. Leftovers are supposed to be brown, not black. Black means you're vaping at a high temp. You're certainly getting all the good stuff at that temp, but you're getting a good dose of the toxins you get with smoke as well.