Half-life of CRP is 1 to 2 days. (Whicher & Dieppe, Clinics in Immunology and Allergy1985: 30; 425-446) Steve Davis Principal Biochemist Department of Clinical Biochemistry Royal Glamorgan Hospital Ynysmaerdy PONTYCLUN CF72 8XR Tel (0)1443 443357 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%