We didn’t get D&V in India. I work there 2-3 times a year and have a pretty robust digestive system. But we did have to call an emergency doctor in Delhi for DH when we travelled round Rajasthan for a lung infection so severe he needed antibiotics and we came home early. This was in the November (it was also consistently above 30C then too.) Indian cities are famous for their low air quality. We are often advised at work not to leave the hotel and to keep windows closed and aircon on.
We’d arrived in Delhi on a late evening flight and used an official airport taxi to take us to our pre booked hotel, but the driver took us to ‘a better hotel’ he knew and then argued with us when we wouldn’t go in. We eventually got to our booked hotel, but it was our first taste of being treated like idiot tourists, a theme which continued through the trip. We’d used a phone shop (this was about 20 years ago) to call to change our flights when it became clear we would have to go home early because DH was getting quite ill, and were charged over £100 to make the call from Agra to Delhi. The boy working in the phone shop was quite shameless in admitting he had placed a couple of zeros on the end of the price because European tourists are rich and normally pay whatever he tells them it is.
My other memory of travelling round the Golden Triangle is just how long it took to drive between stops. Eg it’s about 6 hours drive from Jaipur to Jodhpur. Endless driving to get from place to place. I remember it as a trip of fascinating places, but also one which was quite hard work. We went with a reputable tour company and had a driver and guide for the duration, but even a great guide cannot mitigate the pollution, the traffic jams, the kids who follow you everywhere and shout insults at you when you won’t give them cash, the rubbish in the street. The time I spend in India now is just quick dashes in and out, only 1-2 nights at a time, but there’s nothing I see which makes me think it’s a better place now than 20 years ago. I stay in good quality hotels but it’s still dirty, noisy and busier than you can imagine outside the gates, and I’ve been taken back to the wrong hotel again since, and had more than a few tuk tuk rides that feel like being in my own stunt sequence!
It’s definitely a place that will make you sit up and take notice, and the history is fascinating (but be prepared to feel distinctly uncomfortable at some of the descriptions of the British in some places,) but would I go with a baby? Not a cat in hell’s chance. But if the OP is one of those people who really want to push the boat out in terms of exotic, fill your boots, I don’t think you are listening to anyone here anyway.
And Sharm in August? What the heck for? Its main charm (if you could describe anything at all about the place as charming) is the excellent scuba diving. Which is fun when you are 18 months old. Otherwise it’s just a very very very hot dry place.