I found this answer on the Army National Guard forum:

3. One was diagnosed as bipolar as a child, but is no longer on any medication or specific treatment for it. Will this affect his ability to join?

Normally this done on a case by case basis. The prospective applicant would gather all of the pertinent documents from their doctor and submit a medical pre-evaluation (which is done through a recruiter). The Chief Medical Officer will review the documents and make a determination from the facts(i.e. Medical Documents) that are available at his disposal.

As for the web designer’s health problems, if I were to hire one full-time as an employee, I would certainly provide adequate health insurance to ensure the s/eh would get the care needed.

We also need a little common sense. Lot’s of things have genetic components, like you said, but, like everything in life, we need to find a place where we can draw a line.

It seems easy to hold large entities responsible because it’s just a little more money. But think of that principal applied personally. Do you want to be held liable for your web designer’s (nice job, by the way) carpal tunnel or eyesight because he has exceptionally weak cartilage or especially sensittive eyes?

If a soldier smokes, drinks too much alcohol, eats too much fatty food, should s/he he be denied medical coverage as well? Genetic risk factors are like other risk factors in many ways. There’s nothing more sinister about a disease that can be attributed to genes. In fact, almost all disease have a genetic component. How does the military plan to keep track of that? Genetic screening of servicemen and women can’t be too far away.