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  • Group avatar
    Theories about O-negative
    active 1 week, 1 day ago

    How is it possible to have O-negative blood type?
    Tell us what do you know.

    Public Group / 36 members
  • Group avatar
    Please, Help! Blood needed.
    active 1 week, 1 day ago

    If you, your friend or relative need blood transfusion, ask here for help.

    Public Group / 27 members