This Week in PLOS

Researchers from the US, South Africa, and Kenya search for genetic variants linked to enhanced HIV-1 infection risk through sexual exposure in a paper appearing in PLOS Pathogens. In an effort to tap into phenotypes at either end of the infection risk spectrum, the team compared whole-genome sequence data for 50 HIV-negative individuals from sub-Saharan Africa with high HIV-1 exposure and 50 individuals with low exposure but apparent seroconversion.

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US Attorney General Jeff Sessions is considering using DNA tests to determine relatedness between adult and child migrants, the Daily Caller reports.

Bloomberg reports that Brainstorm Cell Therapeutics plans to offer a treatment it is developing under the "right to try" law for hundreds of thousands of dollars.

In Nature this week: expansion of disease-resistance genes among long-lived oak trees, and more.

In a proof-of-concept study, researchers report being able to determine age from dried bloodstains, Discover's D-brief blog reports.