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Epidemiological association-HIV infection and hemophilia

Write down the epidemiological association between HIV infection and hemophilia?

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Since hemophilic patients require frequent transfusions of the clotting factors (IX or VIII) they are more vulnerable to contamination by infectious agents present in blood from that the transfused elements come. In past the blood banks didn’t usually carry out HIV detection tests and many hemophilic patients have become infected with virus.

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