In PA where I am they can't force you to give blood. If you refuse you automatically lose your license for a year. And because driving is a privilege, not a rig

In PA where I am they can't force you to give blood. If you refuse you automatically lose your license for a year. And because driving is a privilege, not a right, they are able to compel you with the threat but not force you to comply. I'm not sure how this varies state to state but here the state can't force you to give up your fifth amendment rights, only make life difficult for you if you don't agree to the blood testing.