FIG. 3.

ICS data for virus-specific CD4⁺-lymphocyte responses in animals vaccinated with DNA/MVA. The frequency of responding CD4⁺ cells against each protein is shown. These frequencies were obtained as described in the legend to Fig. 2. CD4⁺ responses after the first MVA boost (prior to infection), 2 weeks postinfection (acute phase of infection), and 12 weeks postinfection (chronic phase of infection) are shown.