Where is donated blood stored? After you donate blood you might
wonder what happens to it until it is needed by a patient. After
the blood donation is tested, blood suitable for transfusion is
labeled and stored. According to the American Red Cross, red
cells are stored in refrigerators at 6-degrees Celsius for up to
42 days. Platelets are stored at room temperature in agitators
for a maximum of five days, the Red Cross states on its web
site. The Red Cross says that plasma and cryo are stored in
freezers for up to a year.