Virus field research is the collection and study of virus samples from wildlife and the environment. It helps scientists monitor viruses that might transfer from infected animals to people, such as SARS. Experts told us this research improves scientific knowledge of viruses and provides necessary data that can help agencies respond to and predict outbreaks. But researchers may be at risk of exposure to viruses while collecting samples. We suggest policy options, such as requiring that research proposals include risk assessments, and funding the development of new technologies that could reduce the risks of virus field research.