Biomedical and Environmental Sciences (BES) is an international English scientific periodical jointly established by Chinese Center for Disease Control and Prevention (China CDC) and the Coulston International Corporation (CIC), USA in 1988, which is published bimonthly and distributed both in China and abroad. The editorial office is based in the headquarters of China CDC. BES publishes research papers submitted from China and other countries in the areas of biomedical and environmental sciences, which cover public health virology, microbiology, epidemiology, parasitology, nutrition, toxicology, pharmacology, environmental health, chemistry, biological and toxicological effects of hazardous substances including environmental pollutants, food additives, pesticides and industrial chemicals as well as methodological research, including chemical, biochemical, pathological and immunological methods. Experimental studies on natural and synthetic pollutants of the distribution, metabolic characteristics, and their impact on human health are also included. Research on preventive medicine and public health are also welcomed.