Fig. 5From: Construction of a quadruple gene-deleted vaccine confers complete protective immunity against emerging PRV variant challenge in pigletsRectal temperatures (A) and viral shedding (B) of the piglets after PRV GDFS challenge. After PRV challenge, the rectal temperature was recorded, and fever was considered as rectal temperature > 40.5 °C. Viral shedding was detected by viral isolation and expressed as TCID50. All data are expressed as mean ± SEMBack to article page