dsRNA in cells infected with DNA viruses. Vero cells were infected at a multiplicity of infection of 5 with AdV (2), HSV (3), or Vac (4) or left uninfected (1). At 7 h (AdV, HSV) or 5 h (Vac) postinfection, cells were fixed and analyzed by immunofluorescence as indicated in the legend to Fig. 1. Bar, 20 μm. All pictures were taken with the same magnification.