Innoculations
Hi Susan, in Canada, it is recommended that you contact your local health unit and they advise as to what your requirements are prior to travelling to the DR. We had to have the Hep A vaccine and a flu shot before we went - as advised by the unit here in Alberta. Sounds scary but better to be safe than sorry. Of course it also depends on where you are travelling to as well. I am sure the same would apply with an American Health Unit as well. Good luck...
ps- we were also told to take strong insect repellant and to use it in the evenings as the night feeding mosquitoes carry malaria. I think we saw 2 mosquitos the whole time we were there.