Patients of hospitals with a high index of suspicion, and Healthcare providers that utilize needles ( primarily because blood from either can get into the wounds of one another).
Additionally I think servicemen are obligated to have one done on them. Additionally those who wish to donate blood are required to have a negative blood test.
I think that it would be a because they didn't pay attention to mental health but many people have mental health as a real problem and sometimes more life threatening than other health problems.
