Just a quick comment: I'd be wary of any answers to this that focus narrowly on the health impact (eg expected death toll) without trying to factor in other major impacts on well-being: economic (increased poverty and especially unemployment, reduced GDP, lost savings due to market drop), geopolitical (eg increased nationalism/protectionism, and even increased potential for war), and maybe more - even basic things like global anxiety! (Also some benefits, eg reduced carbon emissions, though I'd argue these are overrated.) These aren't easy to assess but I'd be very surprised if they didn't add up to more net impact than the deaths/illnesses themselves.

This was also discussed on LessWrong:

https://www.lesswrong.com/posts/J8JvZxkABWwdXSH9d/is-the-coronavirus-the-most-important-thing-to-be-focusing

It depends if you define "coronavirus" as the virus, or the whole cascading scenario we are in, and whether you take account of fear, coms and incompetence*.

If you consider India, where the scenario includes a national lockdown and secondary deaths from involuntary migration, loss of health services, malnutrition, impoverishment, a huge hit to the economy etc, this is really bad, and comparable to the 1930s, even in the context of malaria etc.

(Apology for not adding links/refs - I'm v busy on ALLFED pandemic work.)

If we had had preparedness in the form of a ready-to-go food voucher system in every large city, or tracing and "smart lockdowns" much of this secondary / cascading impact could have been avoided. Any good working group, if they included lockdowns as part of a pandemic preparedness strategy, would within an hour of interrogating that strategy have seen the need for such a voucher system, and that preparing and installing one would have been ridiculously cheap, compared to the downside risks and consequences, and that maybe a test-trace-isolate as done successfully in Korea and Kerala would be a far better approach.

So that would have taken preparedness work, and imitating best practice in Korea etc, and one way to do this would be through Foresight Institutes not dissimilar from FHI, Gates Foundation, Oxford Martin School etc, which ALLFED.info proposes for South Asia, as do others.

We also, need to understand why the SARS-1 lessons learned were implemented in some Asian countries but not in UK, USA, Italy etc and whether our governments simply lack the needed capacities-incentives-culture, and therefore it must be done by Central Bank continuity teams, private sector or new institutions with their own constitutional/federal mandates, which can't be undone or unfunded by political whim or due to short-sighted errors.

*By fear, coms and incompetence I mean whether your theory of change is along the lines:

< academics do research and propose solutions -> wise politicians listen and implement and never get confused between science and economic thinking and their own agendas >

or whether you take account that

(a) governments don't always successfully limit fear in the population and that fear may drive mass behaviour as much as reality

(b) that how communication happens culturally may be a huge factor (compare NZ, India, China, USA, UK, Kenya)

(c) governments take decisions for a range of reasons, and simply presenting logical solutions to governments, even campaigning for them, isn't effective as many people imagine, especially in high pressure or fast-moving scenarios

So your preparedness may require equal attention to coms/media/internal coms/Nudge work as it does to classic DRR, implementation science/scaling etc.

This is perhaps somewhat unintuitive to the EA movement, which tends to have very few people involved in behavioural and psychological science, with a few honourable exceptions such as Fiona Conlon and the Charity Science (Health) team in India which I believe includes Varsha Venugopal, Krutika Ravishankar, and Nithya Nagarathinam - they are working on SMS messaging to support safer behaviour during covid19.

I will only write a comment and not an answer because I think other people will probably give better answers. The thinking probably includes that 1) the world was unprepared, therefore even if there is a massive effort going on, cheap opportunities to do good might arise. 2) This situation might somewhat change the equilibriums between cause-areas and within EA, also changing how the world responds to risk, which may influence what is neglected and what is not, for example. Here a good post by Peter Hurford.

About the lockdown: I find it difficult to evaluate the short term effects, but thinking about the very long term effects is also probably interesting. On the one hand, under the longtermist view, slowing down technological progress has enormous negative consequences for the far future if the slope of progress continues to be positive. On the other, a lockdown means that the world will take pandemic preparedness more seriously, which in turn diminishes the probability of existential risk, which should lead to a greater positive impact... so, maybe the answer should be "enough lockdown for this situation to improve our chances to face greater threats"? I recognize this is not exactly what you asked though.

There are two different angles on this question. One is whether the level of response in EA has been appropriate, the second is whether the level of response outside of EA (i.e., by society at large) has been appropriate.

I really don't know about the first one. People outside of EA radically underestimate the scale of ongoing moral catastrophes, but once you take those into account, it's not clear to me how to compare -- as one example -- the suffering produced by factory farming to the suffering produced by a bad response to coronavirus in developed countries (replace "suffering" with "negative effects" or something else if "suffering" isn't the locus of your moral concern). My guess is many of the best EA causes should still be the primary focus of EAs, as non-EAs are counterfactually unlikely to be motivated by them. I do think, however, that at the very beginning of the coronavirus timeline (January to early March), the massive EA focus on coronavirus was by-and-large appropriate, given how nonchalant most of society seemed to be about the coronavirus.

Now for the second one -- has the response of society been appropriate? I'm also under-informed here, but my very unoriginal answer is that the response to the coronavirus has been appropriate if you consider it proportional, not to the deadliness of the disease, but to (1) the infectivity of the disease (2) the corresponding inability of the healthcare system to handle a lot of infections. You wrote:

I read the news, too, but there’s something about the level of response to coronavirus given the very moderate deadliness— especially within EA— that just does not add up to me.

And it seems like you're probably not accounting for (1) and (2). It does not seem like a particularly deadly disease (when compared to other, more dangerous pathogens), but it is very easily spread, which is where the worry comes from.