Herpesvirus is a family of viruses that cause a variety of infections in humans and animals. These viruses are known to establish lifelong latent infections in the host, which can periodically reactivate and cause symptoms. There are several types of herpesviruses that can cause different diseases, including oral and genital herpes, chickenpox, shingles, and infectious mononucleosis. Research in this area focuses on understanding the immune response to herpesviruses, developing effective antiviral treatments, and investigating the potential for vaccines to prevent infection.