Adeno-Associated Virus (AAV) is a small virus that is commonly used in gene therapy. It is known for its ability to deliver genetic material into human cells without causing disease. AAV is considered a safe vector because it does not integrate into the host's DNA, reducing the risk of harmful mutations. Researchers utilize AAV to treat various genetic disorders by introducing healthy copies of genes. This method has shown promise in conditions like hemophilia and retinal diseases. AAV's ability to target specific tissues makes it a valuable tool in developing innovative treatments for genetic diseases.