This is a great example of where we are at currently. This teacher, who actually got to be tested, probably has 15-20 kids in their class, all of whom have probably been exposed at this point. Those kids are going home to their parents, siblings and possibly grandparents, who now may also be exposed. So how many cases are there currently?
We have a massive shortage of ICU beds and ventilators, by far less than what may potentially be needed. Add any craziness that will happen (see discussion on home self defense) and the system will get taxed even more.