Hong Kong was doing pretty good and relaxed their lockdownn measures. Turned out that it was too soon and they have to reintroduce them again. They are starting to see a third wave of infections.
I hope we learn from it in the west but it's hard to imagine.
Hong Kong appeared to have the coronavirus under control, then it let its guard down | CNN
As the sudden surge in cases in Hong Kong shows, quarantines and social distancing must continue well beyond the initial wave of cases, if another round of infections is to be avoided.edition.cnn.com
What really can you learn from though, without a vaccine any time you ease quarantine, new transmission vectors will pop up unless you somehow get the virus down to virtually 0.