TAG ABO is the first multiple-configuration tag for ABO and Rh (+/-) identification.
You can set your personal blood type information just by threading the cord through one of the eight predominant groups.
Wearing it as a necklace or attaching it to personal belongings you will allow others to identify your blood type group in case of emergency.
Doctors always will verify your blood type before a transfusion unless it is a critical situation and you wear a blood type ID.
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