So when China removes all quarantines, what is going to stop the virus from spreading once again? It will spread (of course at a reduced rate since there is some immunity) until one of the following scenarios occurs:

- Virus has exhausted itself with the majority of the population. - Vaccine is developed and universally available. - Virus is eradicated from quarantine (so incredibly unlikely).

I am not an epidemiologist, just writing based off of common sense.