New approach identifies T cells in COVID-19 patients

New approach identifies T cells in COVID-19 patients: T cells play an important role in the human immune system. The blood cells classified as lymphocytes are formed in the bone marrow. From there they travel through blood vessels to the thymus gland in the breastbone. They then form receptors on their cellular surface to identify and fight foreign matter. The T cells also stimulate the formation of B cells, which produce antibodies to attack viruses. Virus-specific immune responses by T cells can be detected in the blood months or even years after an infection.