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Lymphocytes are an important part of the immune system. They help fight off diseases, so it's normal to see a temporary rise in the number of lymphocytes after an infection. A count significantly higher than 3,000 lymphocytes in a microliter of blood is generally considered to be lymphocytosis in adults.
You may have a lymphocyte count that is higher than would normally be expected but have few if any, symptoms. It's usually a harmless, temporary situation, as can occur after an illness. But, it may also represent something more serious, such as a blood cancer or a chronic infection. Your doctor may need to perform other tests to determine if your lymphocyte count is a cause for concern.
Always discuss your results with your doctor.