What are the two type of viral vector involved in gene therapy trials?

Viral vectors are the engineered tools which are used by molecular biologists to transfer genetic material into cells. This procedure can be performed either  inside a living organism or in cell culture.

Viruses have actually  evolved specialized molecular mechanisms which  efficiently transport their genomes inside the cells they infect.

Gene therapy :

Gene therapy is basically an experimental procedure that uses genes to cure and prevent different diseases.

In the future, this technique will help doctors to treat a disorder by inserting a specific gene into a patient's cells instead of using drugs or surgery.