Studies show that there are elevated levels of white blood cells.

Alefacept reduces levels of certain white blood cells in the body.

It serves to stimulate the level of white blood cells (neutrophils).

Doctors found that he had low levels of red blood cells, a symptom of lead poisoning.

Anemia is a low level of red blood cells that can cause fatigue and other symptoms.

A lowered level of white blood cells (neutropenia) is present from birth in some affected individuals.

During recovery from an attack it may appear pus like due to high levels of white blood cells called eosinophils.

A high level of white blood cells (over 1 million per milliliter) may indicate an infection.

Tests have shown that bridge playing increases the level of white blood cells.

Greyhounds also have higher levels of red blood cells than other breeds.