Visited Croatia last December, no special vaccination requirements needed, check the Foriegn Travel Health web site.
You must seek answers to any medical holiday questions from your Doctor, GP, who are the experts. Its a very simple process, they give you a form to complete and the GP/Nurse will let you know if any vaccinations are required.
Just pop into your local pharmacy where you get any medication, if any, and ask. They have a list of every country in the world and can advise. This is what your doctor/nurse will do at the surgery and why sometimes you have to wait a while for the answer. I deal with this type of thing all the time.
You must make sure your normal basic injections are up to date wherever you go Tet, Dip,Hep ask your nurse to check if up to date and any others.............have a great time if you dont sink in the pool lol..........Bobby S.
We did a similar cruise last year, and did not need any vaccinations. No problems at all. Enjoyed Dubrovnic, but the highlight was sailing in and out of Venice. We also liked Cadiz. From a Sospan to a Jack - have a great time.