Medically reviewed by Doru Paul, MD Key Takeaways Leukopenia refers to an abnormally low number of white blood cells, ...

White blood cells, or leukocytes, are the body's first and second lines of defense against foreign organisms and particles. However, few drugs target these cells' production and movement for ...

A simple blood test might determine which patients are at risk for long COVID, a new study says. Higher levels of leukocytes -- a form of white blood cell -- are associated with more severe symptoms ...

HOUSTON. Every three seconds someone in the world needs a blood transfusion. White blood cells (leukocytes) in donor blood can cause serious medical complications, as many viruses (including ...

Share on Pinterest Rejuvenating old blood by blocking inflammation could be the key to slowing aging, new research suggests. Design by Medical News Today; photography by Peter Dazeley/Getty Images The ...