Herceptin was the first, the US Food and Drug Administration says at its consumer updates page. In 1998, the agency approved the drug to treat certain breast cancers, but there had to be a diagnostic to determine what type of breast cancer a patient had. Now, the agency adds, there are 19 cleared or approved companion diagnostic tests for a range of drugs to treat certain diseases and conditions.

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Researchers hope to tease out the signature effects that different carcinogens leave on the genome to determine their contributions to disease, Mosaic reports.

The Wall Street Journal looks into the cost of new gene therapies.

An Imperial College London-led team reports that it was able to use a gene drive to control a population of lab mosquitos.

In PNAS this week: genomic effects of silver fox domestication, limited effect of mitochondrial mutations on aging in fruit flies, and more.