Defects of Innate Immunity

White blood cells (WBCs) encompass a diversity of cells, which can be classified into two broad categories: lymphoid (T, B, NK, and NKT) and myeloid (neutrophils, eosinophils, basophils, and monocytes/macrophages, as well as those derived from the same progenitors, erythroid, and megakaryocytic). This chapter focuses primarily on neutrophils and monocytes and examines the disorders characterized by their quantitative and functional defects.