Fig. 4
From: COVID-19 restrictions limit the circulation of H3N2 canine influenza virus in China
HI titers in serum samples from dogs positive for canine H3N2 virus. In total, 460 serum specimens were tested with an HI assay in 2023, and HI antibody titers ≥40 were considered positive. The number of positive serum samples for each virus is shown. GMTs and 95% confidence intervals are indicated by long and short horizontal lines, respectively