You have not given complete information because there is difference between low levels and abnormally low levels and also high levels and abnormally high levels. It is not necessary that a low level or high levels of any blood cell cause problem. Only abnormal values can cause problems.
Neutrophils and Lymphocytes are types of whit blood cells. Abnormal low levels of WBC can cause increased risk of infection. Abnormal low levels of neutrophils can be due to (<1500) leukemia, infection of bone marrow, radiotherapy and medicines.
Abnormally high levels of lymphocytes (>40%) can be due to flu, chicken pox and some viral and bacterial infection. Some types of leukemia also increase the lymphocytes.
Abnormally high RDW (>14.55) is measured by MCV values. High levels of RDW and MCV can be due to liver diseases, hemolytic anemia, Vitamin B12 deficiency, thalessemia and iron deficiency.
Neutrophils and Lymphocytes are types of whit blood cells. Abnormal low levels of WBC can cause increased risk of infection. Abnormal low levels of neutrophils can be due to (<1500) leukemia, infection of bone marrow, radiotherapy and medicines.
Abnormally high levels of lymphocytes (>40%) can be due to flu, chicken pox and some viral and bacterial infection. Some types of leukemia also increase the lymphocytes.
Abnormally high RDW (>14.55) is measured by MCV values. High levels of RDW and MCV can be due to liver diseases, hemolytic anemia, Vitamin B12 deficiency, thalessemia and iron deficiency.