Viral infection is a research area that focuses on studying how viruses invade and replicate within host cells, leading to diseases in humans, animals, and plants. Researchers in this area aim to understand the mechanisms by which viruses interact with host cells, evade the immune system, and cause symptoms of infection. This knowledge is crucial for developing effective treatments and vaccines to prevent and control viral diseases. In addition, research in viral infection also explores the emergence of new viral pathogens, the spread of infections, and the development of antiviral resistance. Overall, this research area plays a critical role in advancing our understanding of viral diseases and improving public health outcomes.