Good Evening, According to your typhoid history,kind of reasons explain you briefly high white blood cell count usually indicates An increased production of white blood cells to fight an infection A reaction to a drug that increases white blood cell production A disease of bone marrow, causing abnormally high production of white blood cells An immune system disorder that increases white blood cell production, Specific causes of a high white blood cell count include: Allergy, especially severe allergic reactions Stress, such as severe emotional or physical stress Thanks, Dr,Naeem. MD