Fig. 3

The rectal temperatures, clinical scores, and the mortality and weight gain of piglets in different groups during the study. (A) Rectal temperatures of piglets infected with FJLIUY-2017, PRRSV2/CN/G8/2018, and DMEM. The threshold of fever was set at 40.0 °C. (B) The scores of clinical signs of piglets in each group. (C) Average daily weight gain (ADWG) of the piglet during each week of the challenge study. (D) The survival curves of piglets in each group. Data are the mean ± SD (error bars) of every group. Asterisk indicates significant differences between the FJLIUY-2017-inoculated group and PRRSV2/CN/G8/2018-inoculated group (*p < 0.05; **p < 0.01)