Question

Why some blood are positive and some are negative

Answer 1

Positive and negative signs in blood means whether or not the blood contains the rhesus antigen. Rh negative means the antigen is not present and it is safe to donate that blood to other negatives and to positives because the lack of the antigen will not cause an immunity reaction.

Answer 2

$<b>Heya mate...❤❤ Positive and negative blood types refer to the presence or absence of a marker called the D-antigen (or Rh factor). This marker is located on the surface of your red blood cells. ... Rh factor is not an infection. </b>$

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