Thanks for the questions. Always appreciated.
(1) Outside of the hotspots Italy, Iran and Spain the death count is still in 1-5 people per day range, which is very, very low.
This is good news, yes? Why would we think that is not good news?
Low death counts are always good news.
The problem is that people in general have a difficult time internalizing the significance of exponential growth. It is the same in the investment world. When you say that $1,000 today could be $1,100 dollars a year from now the natural reaction is "Big whoop dee doo!". But 40 years from now that $1,000 will be $45,000! That gets people's attention. People (non-mathematicians) are just not wired to really"get" the implications of exponential growth.
In this case, that $1,000 will be $1,170 TOMORROW! Really, those 1,000 cases today will be 1,170 cases tomorrow. And in less than 6 weeks (40 days) those 1,000 cases will be 45,000 cases.
So, let's take some death totals from countries not named Italy, Iran or Spain. Let's say France (61), USA (41) and the UK (10). In two months what death totals are reasonable to expect at 17% daily growth rate? The answers are 750,000 for France, 500,000 for the US and 125,000 for the UK. Significant enough for you now?
The whole point is that the difference between a seemingly tiny number and an Italy situation is only a matter of time (and time meaning only a few weeks) unless that exponential growth gets interrupted. And interrupting that exponential growth is hard from a financial and societal perspective
(2)You seem reluctant to cite actual numbers of dead people and rely on percents instead. Is that because 1-5 deaths per day this late in the pandemic (except for the hotspots) goes against your thesis?
Fair question. But no, I am not reluctant at all to cite actual numbers of deaths. I focus on rates of increase because that is what really matters. As explained above, the difference between a small number and a big number is only a matter of time - and not a whole lot of time at 17% daily growth rates.
Here, total deaths worldwide (excluding China) as of March 12 is 1,801. I have no interest in hiding that number. Now, do you know how long it takes for 1,801 to reach 1 Million at 17% daily growth? About 6 weeks. We will be talking about deaths in the Millions by the end of April UNLESS WE DO SOMETHING DIFFERENT QUICKLY.
Oh, and the notion of "hot spots" - please drop that from your vocabulary. It is a way that we have of deceiving ourselves that something "different" is happening "over there". It's not. Hot spots are simply places that have not yet done something differently. They are us. The US is one gigantic hot spot right now. Give it a few weeks without MAJOR changes to activities and . . .
(3)In a best case, when could we start thinking that this will be more like swine flu than Spanish Flu? Noting that a billion people had swine flu 10 years ago. Not clear how many people died, but maybe 200k.
The numbers you cite for the swine flu show a fatality rate of about 0.02%. This is much less than even the ordinary seasonal flu of about 0.1%. The Spanish flu by contrast had a fatality rate of somewhere between 3% and 10%. This COVID-19 virus currently has a fatality rate of 3.4%. There are reasons to think that this number should actually be lower because many cases are not diagnosed. As I explained in an earlier post, there is also a non-trivial push in the opposite direction for any early stage, rapidly spreading pandemic. Given the numbers to date, it is difficult to see this one as being more similar to the swine flu than the Spanish flu.
I think that it is important to note that we as individuals, and through corporate and government actions can dramatically impact the rate of increase (the 17%). It is almost impossible for the vast majority of us to impact the fatality rate - it is what it is for now.
(4)Not a question but a statement - Do you agree? the big question is how many people have the virus. If 100 million people have the virus, then we'll be ok. If 200,000 people have the virus, then we might be in big trouble
Very good point. If 100 million people have the virus today then, assuming that it is unlikely that more than say, 4 Billion people will get it, then we can expect total growth from here of only 40x at max. That would mean 200k deaths worldwide (even including China this time).
BUT 100 million people with the virus today means there are nearly 1,000 cases in total for every one case diagnosed. No matter how little faith you have in the US testing regime or in the Russian or Chinese reporting, it is very difficult to imagine that there are actually 1000x more cases out there than have been reported. 2x? Sure. 5x? Maybe. 1000x? I'll leave it to the reader as to whether that is in any way believable.
Final point - it is probably best as a society to act as if we are in big trouble and then avoid big trouble than to assume we are not and then . . . I suppose that is only an opinion.