Lentiviruses are a type of virus that belong to the Retroviridae family. They are known for their ability to infect both dividing and non-dividing cells, which makes them unique among other viruses. One of the most well-known lentiviruses is the Human Immunodeficiency Virus (HIV), which can lead to AIDS if not treated. Lentiviruses have a complex structure and contain RNA as their genetic material. These viruses are often studied for their potential in gene therapy. Scientists can modify lentiviruses to deliver therapeutic genes into human cells, helping to treat various genetic disorders. Their ability to integrate into the host genome allows for long-lasting effects, making them valuable tools in medical research and treatment development.