: Can we therefore say that a company has no right to engage in an activity that could endanger the health of those with whom it comes in contact?
Lets use the example of deep sea diver (in oil platforms etc). its a dangerous job, and highly skilled so to attract people to it very high salaries are paid and lots of safety training given. If you see an advert for that job and want it, then you want the risk, you accept it, they tell you what it involves, you accept it. Your body/mind is yours to dispose of - you can still say no and quit at any time. If they agree to provide a level of safety which they then do not, they are in breach of contract.
If you contracted to work in an office, and the boss said 'could you just go and redo that exposed wiring this afternoon' you could rightly say 'no' - you werent employed for it. It wasnt agreed.