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Intradermal pLASV-GPC vaccine antigen expression following ID-EP delivery. Guinea pigs were immunized intradermally with pLASV-GPC DNA vaccine (a–c) or empty vector (d) by ID-EP delivery. Skin tissue samples were collected at 24 (a,d), 48 (b), or 72 (c) hours post-immunization for antigen expression (red) and epidermis (left panel) and dermis (right panel) were imaged by fluorescent microscopy. Red indicates LASV GPC staining and blue indicates Hoechst counterstaining of nuclei.
