Quoting OddSocks post from thread #14
I’m no statistician and definitely not good at maths, but looking at
Operations Dashboard for ArcGIS only 50% of confirmed cases have recovered so far?
I believe a mathematical thing that has to do with the growth rate being on an exponential curve right now. I'm not good at maths so someone might correct me or be able to explain it better?
It's like, 100 people have the virus on day 1, and assuming 100% recovery rate, they will go to the 'recovered' column on day 15.
In the meantime, during those 15 days, more people have got infected. So if another 100 people contracted the virus between day 1 and day 15, you've got 200 confirmed cases, with 100 recovered.
We'll see that pattern change as growth plateaus and then eventually comes down the other side of the peak of the curve.
But before that happens, I would expect that difference between recovered and confirmed to go up, so you might see 100 recovered to 300 confirmed (as a ratio, not as specific numbers).
You could check it out on the figures for South Korea and Italy for the past few weeks and look at the recovered vs current confirmed cases. That should be even worse for that ratio as they're on a steep upward curve, whereas the global figures currently mostly consist of the Chinese cases which have already peaked. But, the predictions seem to suggest that is going to be their first peak, and they'll have another peak later in the year. They've already started importing cases from the rest of the world, and I don't think they'll be able to contain them, they should start seeding new outbreaks as they have in places like Italy and France.