This strongly implies we have a much higher rate of infection than what is being reported.
Unfortunately, it also means things are going to get a lot works. Cordons can work, but they often don’t. It concentrates the disease, and potentially infects those guarding the cordon. It also gives a high motivation for people to flee (in order to not be locked up with sick people) which spreads the disease.
I know. I hate it but sometimes it gets “Daisy Cutter” time. Nice chatting.