Maybe this is demonstrates an immediate consequence of having a people (mainland China, not necessarily HK) that is governed primarily by fear: reactions of extreme subordination, which keep things running "smoothly" under normal conditions, can threaten the whole system to collapse under abnormal conditions.
HK had experienced SARS, and the magnitude of the epidemic, in terms of number of infected globally, has already exceeded that of SARS. Together with government's inaction (HK government is refusing to close down its border where 60s country or so are now blocking entry from China).
HK's medical system is overwhelmed by mainland patients. The nurses and doctors are orchestrrating a strike to urge government closing down its border before the epidemic go out of control. Last strike from medical professionals were 30 years ago to fight for better wage. This time for public good