A blog post at Nature Medicine's Spoonful of Medicine blog this week describes a prototype of newly developed HIV test chip — a little bigger than a credit card — that analyzes blood samples in minutes and sends its results to doctors via the cloud, making it possible to diagnose HIV-infected people living in remote areas.

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In Science this week: swapping yeast genes with human orthologs to study conservation of function, and more.

Hong Kong is using DNA phenotyping to shame litterers.

A study appearing in Cell suggests some metastatic castration-resistant prostate cancer patients could benefit from PARP inhibitor therapy.

NIH's Francis Collins writes that scientific advances are poised to help populations all over the world, but more scientists are needed to keep the momentum.