White blood cells help your body fight inflammation and infections. A high or low white blood cell count may be associated with a number of short-term or long-term health conditions. White blood cells ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...

Every two seconds someone in the U.S. needs a blood transfusion, according to the American Red Cross. “Blood transfusion is a highly critical, life-saving clinical procedure for a variety of patients, ...