As long as you don't have a fever and your appetite is not affected, there is no problem with ordinary recipes. Cooking at home or choosing a restaurant outside is not a big problem. You can eat more nutritious foods and foods containing vitamins C and E, and pay attention to avoiding sweet and greasy foods, spicy and irritating foods, barbecue and fried foods.
If you have a fever, generally speaking, it will have a great impact on the digestive system, whether it is appetite or digestive function. At this time, the best choice can only be a digestible liquid diet, such as noodles and porridge.