My wife and kids have been throwing up and have diarreha off and on for the past 24-36 hours. thinking they have some sort of stomach flu/ virus. is there anything they can take or do? and, what can i take to ensure i don't get it? thanks.

Sounds like it: You're likely correct. For a stomach virus, it's important to maintain hydration (water, sports drinks) and eat a very bland diet as tolerated. Look up the "BRAT" diet. Certainly avoid dairy. As long as there's no fever, it's ok to use loperamide (Imodium) to suppress symptoms. Wash hands frequently and don't share food/glasses etc. See a doc if dehydration or 3 days without improvement.