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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.