A file image of leukemia cells. An over-sterile germ-free environment in the first year of life is one of the major causal factors behind childhood leukaemia, a new study suggests. Image: iStock.

An over-sterile germ-free environment in the first year of life is one of the major causal factors behind childhood leukaemia, a new study suggests. (...)

Heat-activated ‘grenades’ filled with cancer-fighting drugs have been developed by scientists. File photograph: Getty Images/iStockphoto

Heat-activated “grenades” filled with cancer-fighting drugs have been developed by scientists, in the latest step towards treating the disease. The cr(...)