You can contract this FBI by eating contaminated food, drinking contaminated water, infected people, and contaminated surfaces.
This FBI can give you stomach pain, vomiting, and diarrhea. Unless you want these symptoms, stay away from this FBI at all costs.
Make sure to eat clean food and drink clean water. Also wash your hands and avoid sick people. Also other food safety tips: wash your hands before cooking and eating, use clean dishes, use separate platters for raw and cooked meat, use different cutting boards for meat and vegetables (or fruit) and lastly, avoid moldy or rotten food.