Virus-host interactions research focuses on studying the relationship between viruses and their host organisms, including how viruses infect host cells, evade the host immune response, and manipulate host cellular processes to replicate and spread. This research area often seeks to understand how viruses evolve and adapt to their hosts, as well as how hosts defend against viral infections. By studying virus-host interactions, researchers can identify potential targets for antiviral interventions and develop strategies to control viral diseases.