The need for blood is constant, but due to the pandemic, many drives have been canceled or postponed. To replenish supplies for Twin Cities’ hospitals, trauma centers, and air ambulance bases, more healthy donors are needed at blood drives and donor centers in the coming weeks. Appointments can be made online at MBC.ORG or by calling 1-888-GIVE-BLD (888-448-3253).  The Bloodmobile will visit Bauhaus Brew Labs, 1315 Tyler St NE, Saturday, Aug. 7, 12-5 pm;  Indeed Brewing,  711 15th Avenue NE, Monday,…