Question about stomach virus


So I have a severe phobia of vomit-aka emetophobia 🙈 and I’m seriously DREADING the winter months because literally everyone usually comes down with a stomach bug! My question is-can a 5 or 6 month old catch that kind of bug? And if so, how do you mommies manage? He is around his 2 cousins (my father in law keeps them) 3 days out of the week and my niece and nephew go to a Mother’s Day our program so there are definitely germs there! Ugh, help!