Researchers at the Francis Crick Institute have identified genetic changes in blood stem cells from frequent blood donors that support the production of new, non-cancerous cells. Understanding the ...

Lymphocytosis means you have a higher-than-usual lymphocyte count, often defined as more than 3 to 4 billion cells per liter of blood. Lymphocytes are white blood cells that help fight disease. Smudge ...

Aplastic anemia is when your bone marrow can’t make enough healthy blood cells, including red blood cells, white blood cells, and platelets. A CBC measures blood cell levels and is used to diagnose ...

What Does a Hematocrit Test Measure? A hematocrit test is a blood test that measures the level of red blood cells in your blood. Your blood is made up of plasma and blood cells. Plasma is the liquid ...

A vivid new image is taking shape in the world of cell biology: Imagine bacteria adhering to the surface of a cell, perhaps at the site of an injury or wound. In response, a white blood cell arrives ...