According to The American Red Cross, there is a critical need for types O, A, B negative, and O positive.
When there are extreme shortages, such as now, it takes multiple collections over a period of time to see imporvement.
Terry Barker has been donating blood for years. "I started giving blood years ago and I just thought it was a little thing I could do to maybe help somebody that really needs it so it's such a small thing."
It only takes about thirty minutes to dontate blood.
The universal blood type is O Negative and O Positive is the most common blood type requested by hospitals.