I've been type 1 insulin dependent since I was a little girl which is essentially the reason that coupled with time & pregnancy I ended up with kidney failure. I fortunately still get the warning signs of a hypo so I've never needed medical intervention (apart from once on school camp when I wanted to be in bed rather than out on a midnight hike - it was of course faked, so I perked up a bit once the teacher got me back to camp and fed me). I always used to be upfront with employers and colleagues and have lost jobs over it. Back in the late '80s I was denied employment with a bacon packing company, they considered me an AIDS risk because I inject and supposedly I could infect the bacon! It's that kind of ignorance that makes people hide their condition.