Viral load measured by RT-qPCR following experimental bath challenge with SAV3 in post-smolt. The results represent viral load in sera (A, C and E) and hearts (B, D and F) from Low (A and B), Medium (C and D) and High (E and F) doses. In each graph results are presented either as Box and whisker plots (median, quartiles and range) when 4 or more individuals per group were positive; whiskers without boxes when only 2 or 3 individuals per group were positive; a dash when a single positive individual per group was positive. Copy numbers are per 100 µL of serum or per 200 ng of total heart RNA. Line graphs with dashed lines represent the average medians of the viral load in sera (G) and heart (H) over the experimental period from all three doses.