Shown are total lymphocyte counts of the patient group and the best fit curve ).

In the general population very low lymphocyte counts are associated with an increased risk for infection.

Having a low lymphocyte count (below 600 or less than 8% of the white blood cell count).

Most often the lymphocyte count is greater than 4000 cells per microliter ( l) of blood, but can be much higher.

This may still lead to lower lymphocyte counts and higher rates of infection, therefore the combination requires careful monitoring.

When white blood cells are counted, the lymphocyte count is the percentage of lymphocytes present.

There may also be an increased lymphocyte count.

However, if large numbers of hairy cells are in the blood stream, then normal or even high lymphocyte counts may be found.

An absolute lymphocyte count can give a rough estimate of radiation exposure.

Early in the course of disease, the absolute lymphocyte count is often decreased.