(a)
(b)
(c)
(d)
(e)
Figure 7: Neutralization of RSV on Hep-2 cells, immunofluorescence microscopy. (a) Negative control: uninfected Hep-2 cells, (b) positive control: RSV infected cells only, (c) PBS group: RSV mixed with sera collected from PBS injected mice, (d) RSV sera: RSV mixed with sera collected from RSV infected mice, and (e) PF DNA sera: RSV mixed with sera collected from PF-immunized mice.