Brazilian researchers suggest that the combination of drugs that block a protein called PAF-R may increase radiotherapy's killing of tumor cells by one third. The experiments that proved the involvement of PAF-R in tumor repopulation were performed with human oral cancer cells and murine cervical cancer cells, in which radiotherapy is usually preferred.

A new study by scientists from the Smithsonian, the Panamanian government and the US Environmental Protection Agency, among other institutions, concludes that conserving old-growth tropical rainforest is 'highly recommended' to prevent new outbreaks of viral and parasitic mosquito-borne diseases.

Development of games prevents cognitive decline in elderly people. The study involved a control group and a third group of people who learned to play video games.

A longstanding obstacle to the market for bovine embryos is about to be removed. Researchers have described a hitherto unknown mechanism of lipid accumulation in oocytes that limits the success of in vitro production of bovine embryos.

Thanks to a secret vaccine ingredient as well as a net of worldwide researchers and successful vaccination campaigns, smallpox was finally eradicated in 1977. A new study entitled 'Revisiting Jenner's mysteries, the role of the Beaugency lymph in the evolutionary path of ancient smallpox vaccines' and published in The Lancet Infectious Diseases, provides an in-depth investigation of the mysteries associated with the development of smallpox vaccine and is a rich and interesting account of how the vaccine lymph was spread worldwide.