The normal levels of lymphocytes present in the blood usuallyrange between 1200 and 3200 lymphocytes per milliliter of blood.However; different laboratories may follow different standards ofvaluing the normal levels of lymphocytes. Hence, it is important toconsult a doctor for interpretation of the lab results of a bloodtest as also for understanding the status of lymphocyte.Just like high lymphocytes count, low levels of lymphocytes mayalso point to the possible presence of an underlying condition.Some of these health conditions include the following:Aplastic anemiaSteroids use side effectsHIV / AIDSTumorsMultiple sclerosisAn overactive adrenal cortexGuiallain-Barre syndrome which refers to weakness in legs andarms, which generally results from nerve damageMyasthenia gravis which refers to muscle weaknessIf you mean 48 and not 4800, your level is much too low. If4800, it is high and may be due to an infection or leukemia.