If a donor has just donated whole blood, what is the recommended waiting period before donating platelets again?

• A. 24 hours
• B. 72 hours
• C. 48 hours
• D. 96 hours

Answer: (B)

After giving whole blood, the body needs a short recovery window before you donate platelets again to ensure you have a safe and adequate platelet count for the next donation. Platelets are temporarily reduced by the blood loss, and while many of the blood components rebound quickly, a few days are needed to restore platelet numbers to a safe level. The 72-hour interval is the standard window used to balance donor safety with donor availability, giving the body time to recover without delaying donation too long. Shorter intervals, like 24 hours, risk low platelet counts at donation, while longer intervals unnecessarily delay platelet program availability.