Recombinant viruses are excellent tools for the introduction of genetic material into host cells. There are many choices, and each viral vector has its place. In order to choose the best viral vector for your research goals, ask yourself the following questions:

• Do you plan to infect dividing or non-dividing cells?

• Do you need transient or stable expression of your gene?

• Are you concerned about a possible immune response from your target cell upon infection?