You should take some time to understand the health conditions in your host country before you leave. Regardless of where you go, it will take some time for your body to adjust to changes in food, water, altitude, weather conditions, etc. You may find that you are more susceptible to colds as you adjust to your new environment. The availability of medications and health care in your host country may differ greatly from the U.S. You can minimize your risk of illness or injury by being aware of the health issues in the countries you will visit. Travelers need to be careful to avoid excessive exposure to heat or cold, drink plenty of fluids to avoid dehydration. Avoid alcoholic beverages, coffee, tea, or caffeinated sodas. Get plenty of sleep. You will most likely be walking considerably more than you normally would at home. Wear comfortable shoes that support your feet.