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Delayed-type hypersensitivity reaction assessed as the mean footpad swelling ± standard deviation of animals immunized with ovalbumin (OVA), Al(OH)3/OVA or PMMA/DODAB/OVA (NP/OVA). p < 0.05 compared to the naive group (*), p < 0.05 compared to the OVA group (#), p < 0.05 compared to the Al(OH)3/OVA group (∆).
