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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American scientists find themselves once again warning the Trump administration not to dismiss science, the New Yorker report.

A new study suggests CRISPR could be used to save coral reefs from dying off, Forbes reports.

Researchers have found that the i-motif shape of DNA previously observed in the lab also exists in human cells, and that it may serve a purpose.

In PNAS this week: a genomic, transcriptomic, and metabolomic analysis of the tea plant, Arabidopsis thaliana's adaptations to specific local environments, and more.