I'm sure freefall won't happen again if there is something that can make this coronavirus disappear immediately and also, at least there has been news about vaccines related to this problem, hopefully there will be more positive changes in the near future if the vaccine is correct and can be mass produced because after all, this problem must be resolved quickly if we don't want this crisis to get worse.
Validating the potency of the vaccine can take 12-18 months according them. But starting this trial vaccination is already good news. I hope they will be on the way to finding the appropriate vaccine to stop people from panicking.
https://apnews.com/76b614811eef32955180c8260188bc24
https://www.nytimes.com/2020/03/16/health/coronavirus-vaccine.html
But, I don't know what to say about this graph. As China has declining their number in covid cases, the rest of the world is increasing. Are they still covering up something here?
in some part they cover real information and show what they want, remember that China is communist and everything is controlled by the government.
answering your question from the chart, it is more likely because many cities was in quarantine and up to date some still ongoing.
the lock down lead to 0 movement outside, if a person was caught outside without authorization, that person would be paying a big fine.
now besides from Asia, every continent are ignorant and don't care about taking prevention. lot of people are not used to use mask and avoid crowded places, now you have the result in each country.