You will seldom hear of stomach problems from tourists in Baja. The difference is in the water. Water in mainland Mexico comes from rivers, whereas water in Baja comes from deep artesian wells. There are a variety of medicines and preventatives available. Because of the change from your home we strongly advise that you do not use tap water for drinking or brushing teeth.
Bottled water is easily available for purchase.
We will have a plentiful supply of purified water for the kayak trip. Food bought in restaurants or from street vendors is quite safe. Fresh fruits and vegetables are also quite safe. On our trips our cooks are well trained in proper preparation of our meals. No immunizations or vaccinations are presently required for Mexico.