Second Hand and
Third Hand
Marijuana Smoke
"Smoke from marijuana combustion has been shown to
contain many of the same toxins, irritants and carcinogens as
tobacco smoke."

Secondhand marijuana smoke contains many of the
same toxins and carcinogens found in directly-inhaled marijuana
smoke, in similar amounts if not more.

There is concern that it (Second Hand Marijuana Smoke)could
cause harmful health effects, especially among vulnerable
children in the home. Additional research on the health effects
of secondhand marijuana smoke is needed.
Smoking marijuana clearly damages the human lung.
Research shows that smoking marijuana causes chronic
bronchitis and marijuana smoke has been shown to injure the
cell linings of the large airways, which could explain why
smoking marijuana leads to symptoms such as chronic cough,
phlegm production, wheeze and acute bronchitis.

Smoking marijuana has also been linked to cases of air
pockets in between both lungs and between the lungs and the
chest wall, as well as large air bubbles in the lungs among
young to middle-aged adults, mostly heavy smokers of
marijuana.

Smoking marijuana can harm more than just the
lungs and respiratory system
—it can also affect the
immune system and the body's ability to fight disease,
especially for those whose immune systems are already
weakened from immunosuppressive drugs or diseases, such as
HIV infection.

Smoking marijuana hurts the lungs' first line of
defense
against infection by killing cells that help remove
dust and germs as well as causing more mucus to be formed. In
addition, it also suppresses the immune system. These effects
could lead to an increased risk of lower respiratory tract
infections among marijuana smokers, although there is no clear
evidence of such actual infections being more common among
marijuana smokers. However, frequent marijuana-only smokers
have more healthcare visits for respiratory conditions compared
to nonsmokers.

Studies have shown that smoking marijuana may increase the
risk of opportunistic infections among those who are HIV
positive, although it does not seem to affect the development of
AIDS or lower white cell counts.
Secondhand marijuana smoke isn’t only
harmful, it’s more damaging than tobacco
smoke
. To protect the long-term health of our heart and lungs,
we need to avoid exposure. Interestingly, studies show it’s the
burning of plant material that causes impairment to our blood
vessels, not the THC (the psychoactive ingredient in marijuana)
or the rolling paper. Bottom line: You can’t simply change those
factors and enjoy harmless smoke.
Including Medical Marijuana Smoke
Medical Marijuana Smoke
So far, there has been no differentiation between Medical Marijuana Smoke
and Recreational Marijuana. That is because when Marijuana is combusted
or burned it does not know the difference
Below is a link showing what has occurred when someone uses Medical
Marijuana and the Marijuana Smoke seeps into an apartment of a
non-smoker. She claims how sick the woman became from Medical Marijuana
National Institute on Drug Addiction says that "The known health
risks of secondhand exposure to cigarette smoke—to the heart or
lungs, for instance, raise questions about whether secondhand  
exposure to marijuana smoke poses similar health risks.