What are the pros and cons of having Type O negative blood?

Honestly, there are no pros or cons to having O negative blood, other than the ability to pat yourself on the back when you hear that it is the "universal donor.". Blood is usually not given that way; only a relatively small percentage of blood, the first one or two units in an emergency, is given in the "universal donor" fashion. read more

Because O positive is the most common Blood type (39% of the population), it is needed more often by people requiring Blood in hospitals. Facts about Blood Types with charts about Blood Types and Blood type information. O - 7% of the population has O negative Blood. People with O negative donors are potential universal red Blood cell donors. read more