Low anti-body titer cold stored O+ whole blood is an FDA licensed and AABB approved blood product for administration in emergency release situations when other blood products are unavailable and/or the patient’s blood type is unknown. It is the unit of blood drawn from the donor which has been tested like any other blood product and a preservative is added (just like any other blood product) so it contains the red cells, plasma, platelets and white cells from the donor just like it was when it was circulating in their veins.