Completing the Donor History Questionnaire before the Donation Visit Can Improve Blood Safety.

Background And Objectives: In Germany, the donor history questionnaire (DHQ) is traditionally filled in at the donation center to avoid any influence of others. Since March 2020, it has been suggested to donors to answer the DHQ already at home and to call if they have any concerns to reduce the number of ineligible donors on-site during the COVID-19 pandemic.

Materials And Methods: We evaluated the rate of ineligible donors before and after March 2020.