The results of the study conducted by Oh J et al. revealed that [14, 15] CP infection was also correlated to the severity of CHD, and that the positive rate of serum CP-IgG was significantly higher in patients with acute myocardial infarction and unstable angina pectoris, when compared to patients with stable angina pectoris or healthy people. This evidence concerns the gene CP and myocardial infarction.