|Leukemia is a type of blood cancer that begins in the bone marrow and is the cancer of white blood cells called leukocytes.white blood cells are important and are used ny the body to defend against microbes and to fight againt infections.symptoms include bleeding, fatigue, increased infections etc. causes include smoking, chemotherapy, down syndrome etc. Online Journals are scholarly and peer reviewed journals. The journals provide forum and motivates scientists, researchers, academics, engineers, and practitioners in all aspects to share their professional and academic knowledge in the fields computing, engineering, humanities, economics, social sciences, management, medical science, and related disciplines. Online Journals also aims to reach a large number of readers worldwide with original and current research work completed on the vital issues of the above important disciplines. The journals permit all readers to read, view, download and print the full-text of all published articles without any subscription or restrictions.