Help me please!! 10 points???? Help?

Ok. So I have a mive phobia of vomiting right.. And well I'm going on my annual holiday today for a week. And yesterday, I went to the city and my cousin was touching ALLLLL the elevator ons and all the crossing the road ons.EWWW and buying food from really busy shops... What of she caught gastro? She was TOUCHING IT ALL! to piss ke off!!!!!! God knows what germs are on there! Is that how gastro is contagious?? Through touching things like that? Dont wanna get sick on my Jholday