What percentage of white blood cells is comprised of lymphocytes?

Lymphocytes are a crucial component of the immune system and play a vital role in the body's defense against infections and diseases. In a healthy adult, lymphocytes typically comprise about 20% to 40% of the total white blood cell count, with the figure most commonly reported being around 20% to 35%. This range reflects their significant contribution to the overall immune response, which includes B cells responsible for antibody production and T cells that eliminate infected or cancerous cells.

The choice indicating 22-35% fits well within this context, accurately representing the normal proportion of lymphocytes in the white blood cell population. This understanding is critical in clinical practice for diagnosing various conditions, as deviations from these expected ranges can indicate underlying health issues or immune system disorders.