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.
  Neutrophils, a type of granulocyte (a type of white blood cell including neutrophils, eosinophils and basophils), is the most abundant white blood cell in the body. neutrophil is a leukocyte that has phagocytic activities and consumes foreign microbes and particles. Neutrophils engulf and destroy bacteria coated with complement proteins or antibodies. Neutrophils are type of granular leukocytes and are the first to respond to bacterial invasion.