Which blood donor may donate on September 10th?

The correct choice refers to a man who had plateletpheresis on August 24th as eligible to donate on September 10th. In blood donation protocols, the deferral period after a plateletpheresis donation is typically shorter than that for whole blood donations. Generally, platelet donations can be made every 2 weeks, meaning a donor who had plateletpheresis on August 24th would be eligible to donate again on September 10th.

In contrast, other options present donors who do not meet the required waiting periods for their previous donations. The woman who last donated on July 23rd, for instance, would need to wait a minimum of 56 days before donating whole blood again. The man who made an autologous donation only 2 days before does not meet the required time since the blood bank generally requires a significant waiting period for autologous donors due to the nature of their donation. Finally, the woman who donated blood for her aunt on August 14th would also be subject to the 56-day deferral period for whole blood donations and is therefore not eligible to donate again by September 10th.

This understanding of donation timelines and guidelines is crucial for ensuring donor safety and the safety of the blood supply.