The cognate that has nothing to do with the medical system is delicioso.
What are Cognates?
These are words that have the same meaning in two languages and also their writing is the same or very similar, so it is not only necessary that they be written similarly in these two languages, but that they mean the same.
In the case of the given options, it can be identified that words like doctor, injection and hospital belong to the medical system, while delicious is so general that in context it does not belong to this topic.
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