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A new study has discovered viruses in almost 40 % of more than 1,400 bathing water samples collected from coastal and inland areas in 9 European countries. The findings, presented in the journal Water Research, suggest that the presence of infectious adenoviruses and noroviruses in water samples 'could pose a risk to health.'

A class of engineered nanoparticles -- gold-centered spheres smaller than viruses -- has been shown safe when administered by two alternative routes in a mouse study led by investigators at the Stanford University School of Medicine. This marks the first step up the ladder of toxicology studies that, within a year and a half, could yield to human trials of the tiny agents for detection of colorectal and possibly other cancers.