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Detection of SARS-CoV N-specific IgG and subclasses in vaccinated mice. Animals were immunized intramuscularly (i.m.), by electroporation (i.e.), orally using live-attenuated Salmonella typhimurium (oral). Mouse sera (8 per group) were collected 10 days after the final immunization and assayed for IgG1 and IgG2a against the N protein of SARS-CoV. Data are presented as means ± S.D.
