Neutrophils and lymphocytes are two types of white blood cells that play important roles in the immune system. Neutrophils are the most common type of white blood cell, and they help to protect the body against infection. Lymphocytes are a type of white blood cell that helps to fight off viruses and other foreign invaders. The Neutrophil to Lymphocyte Ratio (NLR) is a measure of the ratio of these two types of white blood cells in the blood. A high NLR is a sign of inflammation, and it has been