A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body," according to American Red Cross.
WAUSAU, Wis. (WSAW) - The Wausau Community Blood Center says there is a critical need for Type O blood throughout the country. The American Red Cross says Type O-Negative blood is the most common ...
SAN ANTONIO – Type-O blood levels are critically low in San Antonio and the South Texas Blood and Tissue is asking the community to help. STBT officials said they need more than 100 units of Type-O ...
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