When blood is donated it is rigorously tested for infectious diseases including HIV, hepatitis B, C etc as well as malaria. If any serious disease is found, that particular blood will not be used for transfusion, and the donor will also be notified. Next the blood is grouped as A, B, AB or O and also matched for the rhesus factor as positive or negative. Now, if a patient needs blood transfusion, his blood sample will be similarly grouped and cross matched to blood already present in the blood bank. He will receive the right blood group which is also matched for the rhesus factor, in that way there will be no adverse reaction. There is also meticulous checking to make sure that no mistake is done such as giving the wrong blood to a patient. Sometimes a particular patient may require a large amount of blood over a short period of time in that case he will receive blood group O negative which can go into any person regardless of their individual group without causing any severe reaction.
I am not entirely clear about the point you are raising ” progression towards HIV.” As I have already said, if the blood is meticulously screened for HIV etc, how then will the HIV get in? I admit that in the past some patients did receive bad blood which resulted in HIV?AIDS and other diseases. But these procedures have now been tightened, even in developing countries due to HIV?AIDS epidemic of 1980s, blood transfusion has been centralized and cleaned up by the Red Cross. I hope this helps.
Pellegrini Kitara-Okot
http:www.malariapreventiontips.com

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Face healing nicely. Blood counts dropping.