Which term refers to the study and treatment of viral infections?

The correct term for the study and treatment of viral infections is virology. This branch of microbiology specifically focuses on viruses, their structure, classification, and their effects on host organisms. Virology encompasses the mechanisms of viral pathogenesis, the host immune response to viral infections, and the methods for preventing and treating these infections, including antiviral therapies and vaccines.

In the context of the other fields mentioned, protozoology deals with protozoa, which are single-celled eukaryotic organisms, while mycology is the study of fungi, including yeasts and molds. Bacteriology focuses specifically on bacteria, their characteristics, and their roles in both health and disease. Each of these disciplines addresses different types of microorganisms, which is why virology is distinct in its focus on viruses.