As we welcome more students back to our campus, Dr Andrew Lee, Reader of Global Public Health in the School of Health and Related Research, and one of the academic experts advising the University about its response to Covid-19, looks at the research on transmission risks in teaching environments and shares his expertise on what to expect in the coming months. For the most up-to-date safety information for staff, visit: https://www.sheffield.ac.uk/coronavirus/staff#safe