Alcohol is probably going to be the first luxury item, as it was heavily consumed throughout the bronze age. There will probably be two variations, beer (which can be produced from wheat), and wine (which can only be produced on special terrain). Beer will be easier to produce, but less effective than wine.
Plagues might make an appearance, but doctors won't. The iconic plague doctor is really a product of the middle ages, in the bronze age people still attributed disease to demons, or bad spirits.