Lead flashing was commonly used on chimneys, around other roof penetrations such as vent pipes, and roof junctions, such as valleys. It is still used for this, but is less common because of its cost, and the availability of alternatives. Modern alternatives: pvc, butyl rubber etc. are often less durable.
Granulocytes, specifically neutrophils, help the body fight bacterial infections. The number of granulocytes in the body usually increases when there is a serious infection. People with a lower number of granulocytes are more likely to develop bad infections more often.
Neutropenia is a blood condition, a granulocyte disorder, that characterized by a deficiency of neutrophils, a type of white blood cell that defends the body against bacterial and fungal infections. Granulocytes are a category of white blood cells. They are made in bone marrow.