<unk>  is usually a result of viral parvovirus B19 infection, which invades and destroys red blood cell precursors and halts the red cell production. If infection occurs in individuals with sickle cell anemia, spherocytosis, or beta thalassemia, it will lead to incorporation of two anemia-induced mechanisms: decreased red cell production and hemolysis. The result is a rapid and severe anemia (aplastic crisis) which may require blood transfusion.
Reticulocytopenia
Monocytopenia
Thrombocytopenia
Lycopenemia
Lymphocytopenia
Neutropenia
Reticulocytosis
Plasmacytosis