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.
The answer is C. They are children's doctors.
I think it’s A but i’m not quite sure!
No u shouldn't leave it open.
It can be really dangerous.
For example: It might sound crazy but imagine a rodent eating the hose that the gas passes through,the gas leaks and dangerous things can happen cuz propane is flammable especially when mixed with air(oxygen).