Wei Dai now writes,

The world is probably going to lose 5 2.5-10% of its population (380 190-760 million, see here for the reason for my edit), worse than the Spanish flu even on a percentage basis.

I have some questions about this conclusion and I'm still unsure whether to treat this sort of argument very seriously. But suppose it does come out that between 2.5% to 10% of the world population will die. What are likely results?

I have speculated some of the following. Let me know whether anyone here would agree with my tentative reactions. If the death rate is towards the upper end of 10%, my reactions are probably conservative as I see worse things also happening. Individually I expect each to happen with >50% probability conditional on the above death rate:

• Net negative GDP growth for 2020, with a 5% or more contraction, making this pandemic much worse than any financial crisis in recent memory (including the 2008 financial crisis).
• Scientific progress is slowed down, and some technologies take a few more years to come out than they otherwise would have. These include artificial intelligence, plant based meats, anti-aging medicine. This is good if you think that the serial time for AI safety must be lengthened, but bad if
• you thought that the longer we persisted in our current high-risk period of history, the lower chance we have of surviving
• you worry about value drift from current norms about AI safety, or society more generally
• you personally wanted to live until some technological achievement.
• Life expectancy will drop into the mid 70s in developed countries.
• Most people will know several people who died of the coronavirus, especially if you knew a lot of old people.
• A global day of remembrance is declared, and the history books have an entire section on this year as being pivotal in some aspects of world history.
• The funding for the CDC is multiplied by at least a factor of five.
• Comprehensive bipartisan legislation is passed that employs tens of thousands of people to continuously monitor the threat of viruses of this magnitude in the future.
• Lasting injury from the coronavirus is a major disability in the world, and is viewed somewhat akin to how people view polio victims even after polio leaves a community.
• More young students (>100% increase) want to study epidemiology because they are told that it's a major way to help people in the future, similar to how people are currently being directed into environmental fields as a way to help with climate change.
• Questions about whether we are taking a current outbreak "seriously" will be the main thoughts on the mind of nearly everyone, including TV anchors, continuing for decades after the event. Here I imagine if a virus sprang up again in some part of the world, world leaders would immediately declare emergency and say that they don't want it to "Turn into 2020" or something like that.
• Lasting outcry from people who believed that regulation or poor leadership slowed the development of a vaccine or antiviral spawns a political movement to speed up such things in times of crisis.
• By November, virtually all political discussion is about the coronavirus, and relatively little airtime is given to other causes. Biorisk remains a major issue in the next few presidential elections.
• Intense criticism of the Chinese regime first for censoring people who spoke about the virus, and then for offering the world optimism when there was none, will be a critical issue, leading to riots and perhaps attempted revolutions.
• A one time significant political realignment towards people who are young.

Can you come up with anything else?