Percentage of all subjects at age 70 and above, 60–70 years old and 50–60 years old showing an increase in WBC, red cell count, hemogloblin, hematocrit, MCV, MCH and MCHC from 0 to 6 weeks and 6–12 weeks. MCH, mean corpuscular hemoglobin; MCHC, mean corpuscular hemoglobin concentration; MCV, mean corpuscular volume; WBC, white blood cell.