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If it is apart of the medial practice, simply ask you doctor.
If you alone in the wild and are very hurt with a wound that is likely to become infected, maggots can be used to eat certain parts of that wound before infection takes place, but it's a caveman remedy and I bet is frowned upon in most societies.
Medical Maggots are by prescription only in the United States.
Are far as other countries I am not sure.
You can read about it here: