“…In man, cigarette smoking has been shown to lead to significant amounts of Creactive protein in the serum, an abnormal protein associated with inflammatory or invasive neoplastic diseases (Heiskell, Miller, Aldrich & Carpenter, 1962). Titres of non-specific agglutinins were depressed in smokers' sera relative to non-smokers (Fletcher, Sumney, Langkamp & Platt, 1969), together with depressed level of humoral IgG (Vos-Brat & Riimke, 1969).…”