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PRV RNA in heart by RT-qPCR. (A) PRV RNA in heart measured by RT-qPCR, shown as individual and median Cq-values from 2 to 10 weeks post challenge (wpc), (B) also shown as line graph with median Cq-values. (C) Statistical analysis comparing median Cq-values at peak RNA loads in heart for NOR-2018/SF and NOR-2018/NL to that of NOR-1997 NOR-1996, NOR-1988 and CAN 16-005ND using Mann-Whitney test, results shown as p-values (* p < 0.05, ** p < 0.01, *** p < 0.001).
