Lentiviruses are a type of virus that belong to the family of retroviruses. They are known for their ability to infect non-dividing cells, which makes them unique compared to other retroviruses. Lentiviruses can integrate their genetic material into the host's DNA, allowing for long-term infection. One well-known example of a lentivirus is the HIV, which causes AIDS. These viruses are often studied for their potential in gene therapy. Researchers can modify lentiviruses to carry therapeutic genes into human cells, offering a way to treat genetic disorders. This approach takes advantage of the virus's natural ability to deliver genetic material effectively.