As a national-level institution specialised in environment and health, the National Institute of Environmental Health (NIEH, China CDC) serves as a center for operational and technical guidance, focusing on disease control, emergency response, scientific research and education. The NIEH is dedicated to the prevention and control of environmental pollution-related diseases, population health promotion, carrying out investigation, surveillance and scientific research on population exposure, health effects and health impacts of environmental risk factors, as well as disinfection and infection prevention.