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Safety evaluation of nanovaccine in vivo and in vitro. a Relative cell viability of carp macrophage and EPC cells after incubation with different concentrations of G, MG, SWCNTs-G and SWCNTs-MG for 24 h. b Histopathologic analyses of H&E-stained tissue sections from the brains, gills, intestines, kidneys, livers, and spleens of SWCNTs-MG vaccinated fish after immersed for 10 h, scale bar: 100 μm
