Just to try to put peoples minds at ease. I have done a lot of research on all the rumoured illnesses including going to my GP and intestinal specialist (i have a pre existing illness) There is nothing to worry about. You can get ill from any resort, any country if you are not carefull. I have read reviews on places in mexico and cuba where people are getting ill. Plus we are eating and drinking a lot more than normal(?) which is sure to upset your tummy. I think it is rude for others to put people down (as I have read in some of the forums) for being concerned.
I strongly beleive that everything has been blown out of proportion but if it makes people feel better book an appointment with your doctor to get a proffesional opinion, this may ease your mind and make the trip more enjoyable. If you worry too much it will taint your trip.
Best of health and travel to all.