Genetic tests are helping match patients to treatments that have a better chance of working and are letting some people know their risk of developing such diseases in the first place, but, as the New York Times opinion page notes, others say that DNA testing is too quickly being applied to other areas where the benefit is murkier.

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US News & World Report writes that genetic testing of lung tumors can help identify treatments for patients.

A team of researchers plans to sample Loch Ness for environmental DNA, according to Newsweek.

The New York Times writes about the appearance of mosaicism in healthy people.

In PNAS this week: insecticide resistance patterns Anopheles gambiae mosquito, transcriptome patterns in Pseudomonas aeruginosa during infection, and more.