With our daily routine running at high speed, here’s 5 simple ways to prevent flu, and other viral infections. It’s important to always have a healthy diet. Incorporate fresh, whole foods that are high in probiotics. Make sure you eat sufficient amount of vegetables, meat, seafood and fruits to give you the nutrients you need to survive the day. Make sure your body gets enough sleep. Medical Research Institutions across the globe claim that a minimum of 8-10 hours is necessary for the body to perform all the functions successfully.