I'm so glad you have Occy Health on your side. They can be a valuable ally.
However, as far as the safety or otherwise of your job, you can't change what is. People all over are having catastrophes in their health that has robbed them of promising careers. Nowt you can do about it in the long run.
Last night on BBC1 there was a programme called "The Food Inspectors" - scary stuff. But there was as a story in it about this chap who picked up a dose of salmonella at a Hog Roast right here in my own town. He ended up in intensive care with S. poisoning which almost cost him his life. He recovered after a fashion but it's left him with a bad case of ulcerative colitis and unable to work. He was a senior manager in a firm and had expectations of going to the top. All gone now but to quote the man himself, "I may have lost my job and my health but at least I'm still alive!" I suggest you watch this programme on CatchUP TV or BBCiPlayer and see the story.