Hello and welcome to the forum. Thanks for your question. It's so important that if one is determined to be prediabetic that they work hard to prevent diabetes from becoming their diagnosis. You can help yourself in this situation by changing your diet as well as regular exercise. This article may be helpful to you. https://www.webmd.com/diabetes/features/prediabetes-diagnosis-what-to-do Paying careful attention to what you eat and moving more will help you maintain healthy weight which is an important part of managing prediabetes. Something else that is often overlooked but very important is proper sleep. Make sure you get enough. Talk to your doctor about prevention of diabetes for guidance. As to your question regarding throat infections, I am not sure exactly what you are talking about. If you are getting something like oral thrush, that is indeed linked to diabetes. But sore throats as in tonsillitis are not.