I took my daughter to the fair every day last week (6 days) and she rode rides, ate food, went to the concerts and shows, and we walked around the rides and game areas. Neither of us got sick. I did make sure to make her wash her hands and put hand sanitizer on before eating though. At the concerts it was wall to wall people (not fun for me lol) and she played in the sand that everyone walks in and stands in. We do it every year and we have never caught a bug. I won't lie; it did cause me some anxiety, but it turned out fine and she had a great time! Hope this helps to reassure you a little!