Definition: A decadeivirus is a type of virus that infects cells in the human body, causing a variety of diseases and disorders. These viruses can spread between individuals through contact with infected tissues or fluids, such as blood, saliva, and breast milk. The most common types of decapaviruses include ADV-2, which is responsible for causing HIV/AIDS, and DEC-1, which causes acute respiratory distress syndrome (ARDS).