Isn’t the modelling fairly basic here? Cases double every week, 10% get hospitalized, 1% die in 4 weeks. The rest are cured. Let’s start with a thousand cases today, and only count deaths of these cohorts. You could vary any of these assumptions. Why did I choose 1%? It’s the only estimate I heard which came with a 95% confidence interval of [0.4%, 3%]. Here at minute 16 in this academic lecture. https://m.youtube.com/watch?v=mYTQI2DvAfo,
Ok, so let’s run this simple model. Not saying it’s right, but I’d like to hear which assumption to change here, and even better if there is a prediction model developed by epidiomologists which actually can be compared to future outcomes. According to this model, deaths should match the flu in 18 weeks.
Week 1: 1000 cases
Week 2: 2000
Week 3: 4000
Week 4: 8000 cases, 10 deaths (1% of the 1000 from week 1)
Week 5: 16000 cases, 20 deaths
Week 6: 32k cases, 40 deaths
Week 7: 64 k cases, 80 deaths
Week 8: 128k cases, 160 deaths
Week 9: 256k cases, 320 deaths
Week 10: 0.5 million cases, 640 deaths
Week 11: assume a miracle and no new cases, 1280 deaths
Week 12: no new cases, 2560 deaths
Week 13: 0 new cases, 5000 deaths
Week 14: happy days
Total cases ~1 million
Total deaths ~ 10k
Hospitalization~ 150k total
Seems very manageable at this point. Hopefully the infections start decreasing around here, but I have no idea when that will happen, so i’ll just extend this simple model until there are almost no humans left to infect.
If the miracle doesn’t happen for 5 more weeks , deaths double every week as well, following the infections with a four week lag. So deaths continue as 10k, 20k dead, 40k dead, 80k dead, 160k dead. Now the total deaths cross the flu at 320k approx, and the infected number are about 32 million (100 times the dead, remember this model is with a 1% mortality assumption). Doesn’t seem too bad compared to the flu. But hospitalization is now, 3.2 million, so outcomes may be worse than 1%(or whatever number you assume, as long as a 10% hospitalization rate holds).
Another 4 weeks without a miracle and you get, deaths per week of 320k, 640k, 1 million.
But now the deaths are 2 million total, and infected are 200 million. The series cannot go on much longer as there aren’t many un infected humans left in the USA. Let’s bookend the worst case at 1% mortality at 3.2 million deaths. Lower if some people escaped infection.
Very basic model, but tells me some numbers I can track in the future. If anyone has seen a published predictive model like this somewhere, please share. To be clear, I am not making a prediction, just modelling outcomes with numbers that get thrown around. I’ve tried to use the best estimate for those numbers that I remember, but please correct them if I got them wrong.
Economic costs:
In 1918-19, there were no long term economic effects. As per a fed study. https://www.stlouisfed.org/~/media/files/pdfs/community-development/research-reports/pandemic_flu_report.pdf
Of course there were permanent effects on certain people, but society as a whole bounced back.
Extinction:
I see a lot of people got riled up by my extinction joke in the jokes thread. You guys are way to serious if you can’t take a joke. I obviously don’t believe this is the extinction event. But I do find reasoning of this type funny: “if something has never happened so far, it can never happen in the future.” To me it’s as funny as “I won’t join any club which will have me”. Others in this class are “house prices never go down”, “I don’t believe I can die, show me”, “humans will not go extinct. I won’t believe it until I see it”.
On the possibility of extinction by some other pandemic: we have been lucky so far as all the viruses that emerged so far are not that deadly, or not easy to spread, or turned out to be easy to contain. I certainly hope there is some natural law that prevents the emergence of a virus that spreads like measles and kills like Ebola.
Yours sincerely
Extinction dude
Signature: “Cold never bothered me anyway” /