At a Glance
Why Get Tested?
To screen for or diagnose a variety of conditions that can affect white blood cells (WBC) such as an infection, inflammation or a disease that affects the production or survival of WBCs; to monitor treatment of a blood disorder or to monitor therapy that is known to affect WBCs
When to Get Tested?
As part of a complete blood count (CBC), when you have a routine health examination; when you have any number of signs and symptoms that may be related to a condition affecting WBCs such as infection, inflammation, or cancer; when you have a condition or are receiving treatment that is known to affect WBCs
A blood sample drawn from a vein in your arm or by a fingerstick (children and adults) or heelstick (newborns)
Test Preparation Needed?