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Scanning electron microscope (SEM) images of LdNH36-dg2- or CpG-loaded microparticles or empty microparticles. LdNH36-dg2 protein was encapsulated in poly(lactic-co-glycolic acid) (PLGA) microparticles using a water-oil-water double emulsion method, CpG oligonucleotide adjuvant was encapsulated using an oil-water emulsion method preceded by ion-pairing, and empty PLGA microparticles were prepared by an oil-water emulsion method.
