Leukaemia is a blood cancer brought on by an abnormal increase in the amount of white blood cells in the body. The additional white blood cells do not do the job correctly. Blood has three kinds of cells: white blood cells which fight infection, red blood cells which carry oxygen and platelets that help blood clot. Each and every single day, the bone marrow creates billions of new blood cells, and a lot of them are red cells. Whenever you have leukaemia, your body creates more dead cells than it requires. These leukaemia cells cannot fight infection the way normal white blood cells perform. And as there are so many, they begin to impact the way that your organs work. As time passes, you might not have sufficient red blood cells to provide oxygen, enough platelets to clot your blood vessels, or enough normal white blood cells to fight disease.