To prevent fungal and parasitic infections, keep feet clean and dry, and do not go barefoot. Do not eat food purchased from street vendors. Do not drink beverages with ice. Do not eat dairy products unless it is known that they have been pasteurized. Do not swim in freshwater.
Salt water is usually safer.
Although yellow fever does not occur in India, proof of appropriate vaccination may be required depending on one's itinerary. When a case of yellow fever is reported from any country, that country is regarded by the Government of India as infected with yellow fever and subsequently added to the above list. No other vaccination certificate is mandatory, though one may like to consult his doctor for inoculation against typhoid, hepatitis A, and meningitis.