This Week in PLOS

In PLOS One, a team from the University of Wisconsin at Madison reports on findings from a study that used herpes simplex virus sequences to retrace historical human migration patterns. Using genome sequences for 31 HSV-1 isolates from around the world, the researchers uncovered half a dozen clade clusters that appeared to coincide with specific human populations and migration events.

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The US Food and Drug Administration has new guidelines that enable some gene and cell therapies to undergo expedited review, according to the New York Times.

Using gene drives to control invasive species might be too risky, an initial advocate of the approach says.

Researchers have grown tumors in 3D cell cultures to better understand cancer, the Economist reports.

In Science this week: intellectual property experts argue patent battles such as the one over CRISPR are wasteful, and more.