The CDC does recommend typhoid and Hep A immunizations for travel to St. Martin but:
Typhoid vaccine is recommended for those planning an extended stay in rural areas or expecting to consume potentially contaminated food. Typhoid is uncommon in most Caribbean countries. Most travelers do not require typhoid immunization.
Hep A same issue....
If you are staying where most tourists stay and eating where most tourists eat then I would infer that the immunizations are a bit overzealous.
I was a member of a Federal International Medical Disaster response team and we would require those (and more) vaccinations for an imbedded response BUT I have been going to SXM for MANY years and have never heard of ANYONE needing (or getting) immunized before a vacation trip.
