The Human Genome Project, since its completion in 2003, is now making it possible for people to map out their own health status and check for predisposed health problems; in this case prevention is better than the cure.

Bone marrow transplant has been shown to be effective in treating children with immune deficiency problems.  Previously chemotherapy had been used to treat these patients but due to its long term effects on the body it was not a good option for treating children.  Mark Gough speaks to one family whose bone marrow transplant was a success.

Around the world, millions of people suffer from allergies. While many people will go to the family doctor to be tested and treated, often, test results can be inaccurate and medications can be inappropriately prescribed. CNN medical correspondent, Elizabeth Cohen discusses new guidelines for patients which aim to help them avoid these problems.