Grape juice for tummy troubles?

I’m a daycare teacher and ALL of our kiddos have been ill, a few teachers as well. I unknowingly visited my parents last night who also had the bug over the weekend, (they were in the ER). This might sound 200% crazy but, has anyone read that drinking grape juice will prevent the stomach bug if you’ve been exposed? I’ve been drinking it for about a week now and just bought more. Anyone? 🤔😬