How do blood cells fight disease?
White blood cells fight disease; there are several types of white blood cell, but all come under the umbrella term of 'leukocytes'. Each type of leukocyte works on a different threat, or in a different way, but one type chemically poisons bacteria to kill them, & another type wraps itself around a bacteria & carries it away in the bloodstream.
Sorry to disagree, but not all white blood cells are leukocytes. Leukocytes are B-cell, T-cell, and Natural Killer cells which are involved in acquired immunity (you develop it after being born).
Macrophages, mast cells, neutrophils, oesinophils, and basophils are phagocytes (innate immunity-you are born with them), which engulf the pathogen and either kill it right away or signal to leukocytes that a pathogen is present (antigen presenting cells).
A low amount of white blood cells will cause an increase in illness and disease. This is because white blood cells are used to fight disease and illnesses. Everyday, thousands of bacteria and viruses enter the body and the white blood cells fight the them. With a lower count of white blood cells, you are more susceptible to disease as your body won't be able to fight the disease as efficiently.