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(A) Neutralizing antibodies against SARS-CoV-2 were titered on Vero cells at 100 TCID50 virus. (B) S and N protein-specific IFN-γ+ secretion T cells were numbered on precoated PVDF plates by an ELISpot reader. Compared with controls,”*”, p<0.05; “ns”, p>0.05.
