Figure 1B. Antibody detection of pigs experimentally inoculated with SARS-CoV-2.
Detection of neutralizing antibodies (days 0 and 22 pi) in sera from animals inoculated endotracheally (No. 8-10), intramuscularly (No. 13-15) and intravenously (No. 18-20). The graph shows the logarithm of the reciprocal serum dilution vs dpi. Dotted line indicates limit of detection of the assay (1/20 serum dilution). Undetectable neutralization activity was assigned a value of 5.