Avoid riding alone in elevators with strangers. Ask the hotel desk for an escort or ride when there are more people on the elevator. Be sure that your room has a dead bolt, a chain, and a regular door lock. Make sure you use all of them before going to sleep. While water can pose health problems, one can usually find a safe substitute.
Food presents more of a problem.
Certain kinds of food are more risky than most. Foods of particular concern include salads, uncooked vegetables and fruit, unpasteurized milk and milk products, raw meat and shellfish. The bacteria or parasitic cysts in the feces can contaminate fruits and vegetables grown in the fertilized soil. Consequently, you should avoid leafy and uncooked vegetables and salads when eating out or use disinfectants like Pottassium Permanganate while cleaning. Fruits, nuts, and vegetables can be safe if they are well cleaned and still have their skin or shell intact.