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In addition, many countries remain dependent on donation by the families or friends of patients who require blood and, in some countries, blood donors still receive payment.Yet evidence from around the world demonstrates that voluntary unpaid donors are the foundation of a safe blood supply because they are least likely to transmit potentially life-threatening infections, such as HIV and hepatitis viruses, to the recipients of their blood. It is to these unsung heroes that World Blood Donor Day is dedicated.
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