Not too long after the Ebola epidemic began raging in West Africa, Harvard University's Pardis Sabeti worked with Sheik Humarr Khan, the director of the Lassa virus ward at Kenema Government Hospital in Sierra Leone who was treating Ebola patients there, to gather virus samples for sequencing. As the New Yorker reports, Sabeti, Khan, and their colleagues wanted to get a handle on how the virus is mutating and adapting to a human host.

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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.

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

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