I had someone ask me if they should be concerned about flesh-eating bacteria on there trip to Hilton Head next week.https://people.com/health/where-people-have-reported-contracting-flesh-eating-bacteria-2019/
I did a littler research and came the the conclusion that the answer is no. I'm not saying it is impossible, but there are no reported cases anywhere near Hilton Head Island. I found a link to an interactive map that shows all the locations of confirmed cases (see link below). There was a case in Myrtle Beach, but it was caused by a water park, not the ocean.
Enjoy your trip and don't worry too much about this kind of thing.