White blood cells are the guardians that protect us from infections are composed mainly of fat. Marijuana thus lowers our defenses and makes us more prone to infection. Hence, the marijuana smoker is exposed and unprotected against viruses and bacteria.

Indirectly does not protect the human immunodeficiency virus or AIDS virus, and moreover in those infected by the AIDS virus the possibility of smoking marijuana infected precipitates the onset of illness and lowering all defenses and organizational resistance.

Marijuana is very dangerous. Unlike alcohol, which generally leaves the body within 24 hours under its soluble nature, marijuana is fat soluble, which means that the psychoactive chemicals are set in the fatty parts of the body. (usually the brain and reproductive organs) and can be detected until 30 days after the initial one.

Extensive research has shown that marijuana impairs memory loss and slows the learning hinders normal reproductive functions, adversely impacts cardiac functions, has serious consequences on the perception and performance of specialized activities, such as driving or other complex tasks involved in the trial or special motor skills, and seriously hampers the functions, pulmonary and respiratory. A marijuana cigarette contains more carcinogens than cigarette strongest snuff.

It is detected by a sweet smell in the room, clothes, etc.. Also, the general appearance of the addict is drunk (without odor of alcohol.