Right. Unless you are a doctor or other healthcare provider, then you are subject to the duties as prescribed (Ha ha, Rx!!) by your profession. And once you undertake a rescue/aid, you cannot abandon it once in progress. If you do, you can be sued for abandoning the effort. However, there is no law that requires someone to be a good samaritan. The first person who raised the "Good Samaritan" law posited in such a way so that to make sense would require interpreting it as a requirement to act when encountering a person in need. It doesn't make sense as an example of how Biblical law is the same as secular law otherwise. To require someone to render aid would be an example of Biblical law codified in the secular law, but there are no such laws. Only indemnification in the event aid is rendered by a non-medical professional.