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.