Blood Assurance’s supply of O-positive blood is critically low.

Thursday afternoon, they had only 110 units, a half-day supply. That’s 600 units short of where they need to be.

O-positive is the most common blood type, accounting for nearly 40 % of the U.S. population, and is always in high demand from area hospitals.

As a result of the low supply, Blood Assurance officials may have to urge area hospitals to postpone elective surgeries until the supply stabilizes. 

Donors can schedule an appointment at or visit any donation center or mobile blood drive.

All donors who give through the end of the month will enter into a giveaway promotion for a MacBook. Blood Assurance is giving away three of the laptops.