Keeping baby healthy with sick toddler


My 21 month old has some sort of stomach bug. I don’t think he got it from another person, but from eating dirt outside 🤦🏼‍♀️ he’s been puking and vomiting for 2-3 days now and so far my 5 weeker is still healthy, but how besides handwashing and disinfecting wipes can I keep her healthy?