India and Health
There are many rumours and misunderstandings about the likelihood of falling ill in India.
Life for many poor people in India is hazardous and disease ridden. You are not going to be living without sanitation or a safe source of water. The climate in Gudalur and Mysore is certainly healthier than that in the UK. You have to be judicious in what you eat. A street seller of snacks in India is unlikely to have washing facilities on hand, so it is foolish to eat snacks from them. (A hot dog from an illegal stall in London's West End presents the same type of risk - though it might be salmonella not typhoid).
Most of the diseases are waterborne, so be careful about the water you drink, and which your food is washed in. That is why it is better to peel fruit, and avoid salads).
Ice cream should be treated with suspicion, since power cuts may mean thawing and refreezing.
When eating hot food, make sure it is hot (and has not been left standing, so you get it after the flies have defecated on it!). This is a risk at buffets in posh hotels!
Surfaces may be dirty, so keep washing your hands.
You want to be doctors, you should know these things!