The U.S. Bureau of Labor Statistics lists a person who studies viruses as a virologist. A virologist is a type of microbiologist who studies the properties of viruses, including their structure, their development and the effects that they have on infected organisms.
According to the BLS, the job duties of virologists can include planning and conducting research projects, identifying and classifying viruses, and monitoring the effects of viruses on animals, plants and other organisms. Virologists might also attend conferences to keep up with the most recent findings in their field, prepare technical reports, and present or publish their research findings. They typically work in laboratories and offices. Other specialized types of microbiologists include bacteriologists, immunologists and mycologists.