I suggest that you contact Alexandra and obtain her research. You may seek to obtain the Montgomery report from the Canadian government as well.
Our BC salmon, coming out of the Broughton Archipelago, have been decimated by sea lice.
In addition millions of penned salmon have been destroyed due to disease over the years.
For myself, I cannot eat farmed salmon because I am allergic to penicillin. When I have eaten farmed salmon, I have become ill so I avoid it.