Within 3 to 5 working days. After donating blood, the blood bank staff will make further examination of the donated blood, including routine blood examination, five tests of hepatitis B, antibody examination of hepatitis C, antibody examination of syphilis and antibody examination of AIDS. Under normal circumstances, the blood bank staff will inform the blood donors whether their blood is qualified or not within 3 to 5 working days after blood donation. The conditions that need to be met when donating blood are good health, no anemia, cold and fever. You need to observe for half an hour before you can leave after donating blood.