👉 The term "Circoviridae" refers to a group of viruses that are characterized by their ability to infect and replicate in various host cells, often through the circulatory system or other bodily fluids. This includes viruses such as the human herpesvirus 6 (HHV-6), which causes genital herpes, and the parainfluenza virus (PIN-1), which is responsible for the common cold.