Figure 2From: Different clinical, virological, serological and tissue tropism outcomes of two new and one old Belgian type 1 subtype 1 porcine reproductive and respiratory virus (PRRSV) isolates Body temperature of pigs upon inoculation with PRRSV 13V091, 13V117 and 07V063. Temperature ≥ 40 °C was considered as fever. Lines represent the mean value in each group.Back to article page