Chinese Journal of Microbiology and Immunology established in 1981. It is one of the series of journal sponsored by Chinese Medical Association. The aim of this journal is to spread and exchange the scientific achievements and practical experience in order to promote the development of medical microbiology and immunology. Its main contents comprise academic thesis, brief reports, reviews, summaries, news of meetings, book reviews and trends of home and abroad in this field. The distinguishing feature of the journal is to give the priority to the reports on the research of basic theory, and take account of the reports on clinical and practical skills. This publication is intended for the research personnel, teachers, medical workers of middle and high rank in the field of medical microbiology and immunology. For convenience to foreign readers each treatise has its English abstract and key words, each figure or table has its caption in English as well. Since the published articles in this journal can represent the medical, microbiology and immunology research level of the country, it is considered as a core journal in the field of Bioscience and basic medical science in China. They are included by the following well known index periodicals and systems in China such as Data Base of Biomedical Literatures in China, Data Base of Periodicals of Science and Technology in Chinese, Data Base of Current Periodicals Contents of Bio-medical in China, A Guide to the Core Journal of China, Data Base of Science Citation Index in China and Core Journal of Natural Science. They have also been included by several famous foreign publication such as Chemical Abstracts, Biological Abstracts and Excerpta Medica of Holland.