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APCs infiltrate vaccinated skin. Six hours after intradermal EP vaccination dendritic (a) and CD4 (b) cells infiltrate the electroporated skin and decrease starting at 24 hours after treatment ((c), (d)). Red staining shows positivity for CD11 ((a), (c)) or CD4 ((b), (d)) molecule. Magnification: ×200, insets: ×400. Images are representative of three independent experiments.
