tokens: A transfusion of 320 ml 1 - hour - old normal whole blood on the fifty - second day resulted in transitory elevation of the C3 level to 25 mg / dl with a fall - off ( approximately 2 1 / 2 % per hour ) to undetectable levels by 69 hours ; it was followed by disappearance of the skin rash and arthralgias and return to normal of the previously elevated temperature and CRP levels .