The South Texas Blood and Tissue Centers says donors with blood types O-negative and O-positive are urgently needed to help supply hospitals.
The South Texas Blood and Tissue Centers says donors with blood types O-negative and O-positive are urgently needed to help supply hospitals.

Blood types O negative and positive urgently needed in San Antonio hospitals

The South Texas Blood and Tissue Centers says donors with blood types O-negative and O-positive are urgently needed to help supply hospitals.

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