Quote Originally Posted by JackdaWack
by word of mouth i herd that smoking actually lowers your immunity, not sure if its true or not.
It's a pseudo myth spreading around through semi-'scientific' communities... They expose leukocytes, B-cells and T-cells- blood cells which are responsible for fighting off bacteria, viruses and other foreign matter- to extremely high amounts of THC in a petri dish, and are surprised when they die or slow down a bit.

All in all? Smoking regularly or even heavily has a minute effect on your immune system...