👉 A haemacytometer is a type of blood test that measures the levels of antibodies in the blood. It's used to diagnose and screen for diseases like cancer, infectious diseases, and autoimmune disorders by detecting abnormal antibodies present in the body. These antibodies are caused by infections, autoimmunity, or other diseases where there is an overactive immune response. The haemacytometer can be a simple device that allows doctors to detect these antibodies without having to perform blood tests themselves.