I actually can help with the answer to this. It has become WELL ESTABLISHED science in the last several years that blood transfusions are incredibly dangerous. There are several landmark studies that clearly demonstrate patients who require blood transfusions have a much higher incidence of cancers and death at one and five years when compared to similar patients who do not receive transitions (Kaplan must regression curve). We used to transfuse anyone with a hemoglobin below 10. As an intensivist now I hardly ever transfuse unless there is life threatening hemorrhage or I can demonstrate that a patient needs oxygen carrying capacity (the purpose of blood transfusion) by way of some sophisticated lab technique I won’t bore you with. The bottom line. Restrictive blood transfusion techniques clearly are better for the patient in terms of long term survival and this is the standard of care. Blood transfusion for the purposes in this article are just snake oil salesmanship and clearly no reputable science would have someone pay them to assist in research.
I have come to believe that parasites in the blood constitute a significant danger to health. I will check again for the parasite - cancer connections later. Have a pleasant day and weekend. Thank you, Norski