The Institute for Risk Assessment Sciences (IRAS) is an interfaculty research institute (collaboration of the faculties of Veterinary Medicine, Medicine and Science) at Utrecht University. The institute is also supported by the National Institute for Public Health and the Environment (RIVM) and TNO Research and advice.

The IRAS’ mission is to provide education and conduct research in the field of health risks posed to humans by exposure to pathogens and possible hazardous substances in the environment, at work or in the food chain. The institute also studies the effects on ecosystems.