It’s that time of year again — the one all parents dread: cold and flu season! Is there anything that sounds worse than a stomach flu making its way through the entire family? Um, no. But here’s a sneaky mom hack that just might help you and your loved ones avoid catching the norovirus this year: Stock up on grape juice. That’s right, that dark purple beverage you probably already have in your fridge can also be a miracle stomach bug worker.