Let's imagine that you are the event planner for a large children's event. The event is being hosted over the March Break and you expect to see thousands of children and their families attend each day during the March Break week. Activities at your event involve children being in close quarters together such as in a bouncy castle or maze together. You discover 5 days into your 9 day event that a child who attended your event on day 2 was positive and contagious with measles.