Many people in the US are being over-diagnosed and over-treated for cancer and better definitions of cancer and new molecular diagnostic technologies could help solve the problem, according to a working group of the National Cancer Institute.

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The World Health Organization calls for the public release of clinical trial results within a year of the completion of data collection.

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.