Virology is the scientific study of viruses, which are tiny infectious agents that can only replicate inside the living cells of organisms. These microscopic entities can infect a wide range of hosts, including humans, animals, plants, and even bacteria. Understanding how viruses operate helps scientists develop vaccines and treatments to combat viral infections. Researchers in virology explore various aspects of viruses, such as their structure, genetics, and how they interact with host cells. This field is crucial for public health, especially in the face of outbreaks caused by viruses like influenza or COVID-19. By studying these pathogens, virologists aim to prevent and control viral diseases.