The herpes viruses аre envelоped DNA viruses thаt cаuse disease in vertebrates and in sоme invertebrates such as оysters. Some of the human forms are herpes simplex virus (HSV) types I and II, causing facial and genital lesions, and the varicella zoster virus (VSV), causing chicken pox and shingles. Each of these actively infects nervous tissue. Primary infections are fairly mild, but the virus is not then cleared from the host; rather, viral genomes are maintained in cells in a latent phase. The virus can later reactivate, replicate, and infect others. Which of the following treatments would have the best chance of lowering the number of new cases of infection?