A differential blood test enables a doctor to determine how many white blood cells are in the body. There are five types of white blood cell, and the test also shows how many of each type are present.

A differential blood count is a blood test to check your white blood cell levels, which can indicate the presence of infection, disease, or an allergic reaction. Your doctor might order it as part of ...

Sickle cell tests have become routine in newborn screenings, but older children and adults may need to be tested as well. Read on to see if you or a loved one might benefit from being tested for ...

In medicine, a person’s blood-test results are compared with the average range in a population. But results are highly individual and tightly regulated around a person’s own stable values. Changes to ...