Blood is a living tissue made up of liquid, with numerous cells and proteins suspended in it. It is a circulating fluid, containing red blood cells, white blood cells, and platelets. It provides oxygen and nutrition to the body cells through capillaries, arteries, and veins. It also helps to remove metabolic waste and carbon dioxide from the body. A blood screening is a medical process in which blood is examined for a specific disease or condition. It helps to monitor diseases and prevent health issues and a variety of other conditions such as infections and cancer. Human Immunodeficiency Virus (HIV), blood type, and pregnancy screenings are the most common types of blood screening tests.
Blood donor screening is the defense mechanism implemented against the spread of infection prior to blood donation. A number of blood screenings are performed in laboratories before blood or blood products are transfused. In addition, blood is cautiously screened for serious diseases, such as HIV, hepatitis B and C, and syphilis, when it is donated to a blood bank.
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