Donate blood at least several months apart.

Blood donation interval is not less than 6 months.

According to the requirements of blood donors' health examination, the interval between general whole blood donation and platelet collection is not less than 6 months and not less than 2 weeks and not more than 24 times/year. The interval between platelet collection and whole blood donation is not less than 4 weeks; The interval between whole blood donation and apheresis platelet donation is not less than 3 months.