I mean the bathing water, bcoz babies tend to "lick" bath water during showers or baths. Drinking water of course, boiled.TQ!
We've done Burma a couple of times with a young family. It is possible, but its going to be hard work. The water isn't safe to drink and the transport options are challenging.
Wonderful country, but I'd suggest you don't try to take in too much.
Rangoon for the Shwedagon Pagoda alone has to be worth it. I'd also suggest Ngapali beach for something easy and perhaps Bagan - you can fly to both.
Not sure I'd yet do anything more with a 1 year old. over 6 years ago