With recent court rulings in the US against Prometheus Laboratories and Myriad Genetics, rules issued by the Patent and Trademark Office say that for an invention to be patentable it has to be "significantly different" from natural products.
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In Science this week: measles virus nucleocapsid structure, and more.
African and US health officials work to establish an Africa-wide Centres for Disease Control and Prevention.
Nature has retracted a 2002 epigenetics paper for image manipulation.
The World Health Organization calls for the public release of clinical trial results within a year of the completion of data collection.