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Explain why Rh-negative person do not have a transfusion reaction on the first Rh-positive blood but?

Explain why Rh-negative person do not have a transfusion reaction on the first Rh-positive blood but does have a reaction on the second exposure.?

You've got it backwards.

A person with Rh positive blood will not have a reaction to an Rh negative transfusion of the correct blood type because there is nothing to react to; it's negative. The protein is not there.

A person with Rh- blood will react to Rh+ simply because the + protein is present and will cause a reaction.

cos they dont have antibodies to Rh antigen on 1st exposure. after the 1st exposure they develop antibodies to Rh factor . on 2 nd exposure the antibody antigen reaction occurs

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