Some of the virus used as vehicle in the gene therapy which is physical inserts genes in to the host cell delivers the corrected gene in the process of gene therapy. Some of virus used as adenovirus, alpha virus, herpes virus and vaccinia virus.
Viral Vectors are widely used in gene therapy. Viruses can usually infect more than one type of cell. Thus, when viral vectors are used to carry genes into the body, they might infect healthy cells as well as cancer cells