Students in Puerto Rico are studying the DNA of their fellow residents to study disease and other traits in the population, LiveScience reports. The students are collecting spit samples from people at public sites across the island.

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At her blog, Sally Rockey dives into National Institutes of Health funding data.

In PNAS this week: ancestry and admixture in Brazilians, characterization of novel double-stranded RNA mycovirus, and more.

Researchers report that what scents someone picks up can reflect their complement of immune genes.

The New York Times examines ethics and China's push to lead biomedical research.