Thank you for the link. Pueyo's post is very informative, maybe a bit too long for our zeitgeist's average attention span.
Some of the most important points:
.. Cases increase exponentially if there is not any counter measure like social distancing, i.e. keep foreigners 2 m away, keep empty chairs between other people in meetings or at table, avoid touching own mouth, nose or eyes even if they are itching, wash hands frequently, ..
.. Most people just underestimate exponential grow ways off, see f(x) = 2^x or e^x.
..Cases double every 7 days: 1,2,4,8,16 looks harmless first, but then 32,64,128,256,512,1024,2048,
2^10=4096 after less 10 weeks one gets more than four thousand cases and 1 week later there are for thousand additional cases, a total of more than eight thousands.
..See, what started with one to few cases per week for the first weeks, means after ten weeks 4'000+ in one week.
..This is rather hard to believe, that cases still double every week
Imagine the following chain reaction, starting with one burning match stick fire, that lights 2 1/2 other match sticks in la tight second. How many match sticks get burning after only 30 seconds? How many match stick boxes with 50 pieces each can be filled
.. Real number of infected people could be 5 to 10 or even more times the number of proved positive covid-19 tested people.
.. In countries where there are only a few tests per people real number's best guess can be calculated based on number of deaths, the more there are the preciser the guess should be.
.. Every death means about 29.5 times more infected people. But today's death means infection happened at least 10 to 14 days ago, that means today there are 2 to 3 doublings of 29.5 times, say about 175 times of real cases.