Answer:
Dehydration from flu
Explanation:
On centrifugation, blood forms different regions plasma region, the Buffy coat and the hematocrit which contains the erythrocytes or the red blood cells.
The normal range is between 37-52 percent of the total whole blood.
Any value below shows anemia and any value above indicates polycythemia.
Polycythemia is usually a sign of doping in athletes however for this elderly patient. It must have been caused due to dehydration from the flu.