Dak Minn Blood Bank's supply is below desired levels for all blood types. ADVERTISEMENTThey are specifically in critical need of Type O positive and Type B donors. Altru has a critical blood drive scheduled for Wednesday, Aug. 5. "Many first-time donors are surprised at how easy the process is and how rewarding it feels to know that they've helped someone that they may never meet," said Heather Dennison, Dak Minn Blood Bank manager. This Wednesday's blood drive will be at Altru Hospital, 1200 S. Columbia Road, Grand Forks, in Active Learning Rooms 101 and 102.