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  1. Humans

    Smallpox redux: World body suggests keeping the virus

    Fear of bioterrorism has led the World Health Organization to postpone its 2002 deadline for destruction of smallpox virus stocks so that scientists can refine current vaccines and improve defenses against the disease.

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  2. Health & Medicine

    The right fats: Omega-3 fatty acids soothe inflamed colons

    A diet containing fish oil, which is rich in healthful omega-3 fatty acids, reduces symptoms of a colitis-like condition in rats.

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  3. Health & Medicine

    Anthrax-toxin component deciphered

    Scientists have figured out the molecular structure of edema factor, a component of the anthrax toxin.

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  4. Biology of rank: Social status sets up monkeys’ cocaine use

    Male monkeys' position in the social pecking order influences their brain chemistry in ways that promote either resistance or susceptibility to the reinforcing effects of cocaine.