Hello there, Typhoid does make you weak for some time. Coconut water, bananas are beneficial to get rid of the tiredness. You can also have a diet that includes plenty of fresh fruits and greens and take care of your protein intake. Buttermilk, curd, whey protein can be added to your diet. Avoid oily or heavy food as it will make you more lethargic. Precautions that you can take is always drink water that has been sterlised. Either boiled or filtered. If travelling carry your own water bottle or drink bottled water from known brands. Do not have roadside food or chaat or even salads from street vendors. Recurrence is rare unless you have low immunity. Hope this helps, Please feel free to ask any further questions, I will be happy to answer them,