Medical research

Think again about keeping little ones so squeaky clean

A new Northwestern University study suggests that American parents should ease up on antibacterial soap and perhaps allow their little ones a romp or two in the mud --- or at least a much better acquaintance with everyday ...

Medical research

Hosts may use two systems in fight against infection

(PhysOrg.com) -- Over the last decade, vertebrate immunologists have debated the validity of two distinct models of how immune systems work. Now, a Cornell entomologist argues in the April 1 issue of Science that clues from ...

Medical research

Some of your body's cells have a 'license to kill'

Millions of "natural killer cells" -- nature's first line of defense against cancer, viruses and other infectious microbes --- are on constant patrol inside your body.

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