The video contains enough basic knowledge about disorders of white blood cells. These are the defence cells of the body and when their features are disturbed, they may cause disorders. The video contains information about leukopenia, leukocytosis, leukaemia and their types. TIMELINE: 0:00 Introduction 0:08 List of WBC disorders 0:15 Introduction to leukopenia 1:07 Introduction to leukocytosis 1:55 Introduction to leukaemia 2:30 Classes of leukaemia 2:40 Acute leukaemia 3:10 Types of acute leukaemias 3:19 Acute myeloblastic leukaemia 3:45 Acute lymphoblastic leukaemia 4:06 Chronic leukaemia 4:29 Classes of chronic leukaemia 4:36 Chronic myeloid leukaemia 4:57 Chronic lymphocytic leukaemia