I'm sure many have seen this... if not scroll to the bottom for
the JS model (you can download/inspect/modify the code if you
like)... It doesn't stop at SIR but adds H(ospitalization) and
D(eath)... and is parameterized with sliders. https://www.nytimes.com/interactive/2020/03/25/opinion/coronavirus-trump-reopen-america.html And the JS (warning,huge with lots of device/browser-specific
cruft): I don't feel comfortable having a strong opinion about this
beyond echoing what THIS article says about the risk of quick
mitigation followed by return-to-normal *without* establishing
significant herd-immunity. This author refers to it as "hiding
infections in the future" and makes a good point about staving off
infection too well for too long and getting hit hard next "cold
and flu" season IF we haven't established good treatment,
increased health care capacity, and/or effective vaccines. https://medium.com/@wpegden/a-call-to-honesty-in-pandemic-modeling-5c156686a64b For better or worse, other countries are trying different mixtures and styles of mitigation and have different levels of health-care capacity and ability to location-track and shut down mobility. While many criticize (or defend) the lax or laggy response of
many Red States, this provides yet another diversity/ensemble
study for the ultimate "model" of all... in this case, the
territory IS the territory, the population IS one big fat analog
computer for calculating the pandemic (the answer to which, is
naturally 42). Of course, "scofflaw" communities like the spring-break youth,
the evangelical churches, and states like Georgia with governers
who say "we didn't know that people without symptoms could be
infectious until 24 hours ago!" represent a reservoir for exposure
if they continue to mix, but might end up being a source of virus
resistant. https://www.motherjones.com/coronavirus-updates/2020/04/coronavirus-state-social-distancing-policy/
My post-apocalyptic novel might include a study on this: What
if the Blue States mitigate hard and fast, in spite of losing the
battle in a few states like high-density, early onset new york/new
jersey, and reduce deaths (including ones avoidable if not for
overwhelming health-care) but also reduce herd-immunity. And the
Red States limit their mitigation, take a huge hit in infection
and death (but moderated by mostly being less-dense states) but
come out the other side with better herd-immunity. I can imagine
fresh border-checks (remember when every state border crossing had
a weigh station for trucks?) to restrict Red Staters infecting
Blue States early on, then later vice-versa? Seems like the
ongoing extraction economy in (mostly Red States) is pretty
social-distancy while the more service economy of Blue States is
at risk... though professional and even office work is nominally
quite easily social-disanced. Mumble, - Steve
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I was just looking back for a previous conversation about herd immunity and came across what seems to be an accurate prediction from Steve Smith. My post-apocalyptic novel might include a study on this: What if the Blue States mitigate hard and fast, in spite of losing the battle in a few states like high-density, early onset new york/new jersey, and reduce deaths (including ones avoidable if not for overwhelming health-care) but also reduce herd-immunity. And the Red States limit their mitigation, take a huge hit in infection and death (but moderated by mostly being less-dense states) but come out the other side with better herd-immunity. I can imagine fresh border-checks (remember when every state border crossing had a weigh station for trucks?) to restrict Red Staters infecting Blue States early on, then later vice-versa? Cody Smith On Sat, Apr 4, 2020 at 3:46 PM Steven A Smith <[hidden email]> wrote:
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Cody - Thanks for the nod... though I'm less confident in this prediction today than I was back in April... though it is interesting to be reminded of what I was thinking (or at least saying) back then! I think there is a lot more interstate mixing than I imagined would result. The mass attendance at Sturgis is a strong example of gather/scatter with no significant contact-tracing... the few attendees in my larger circle only report: "I was there all week and there were no outbreaks while I was there... see! I tole'ya it was a Democrat Hoax!". I think the "return to college" is maybe providing some mixing as well, though I think it is better than the post Spring Break/Mardi Gras 2020 moments. I haven't followed up enough on the modeling referenced back then
to have even the most general idea of how significant the
differing implied levels of herd-immunity might be. I remember
when some of the early broad testing (e.g. whole communities)
began and there was evidence of more widespread (asymptomatic)
infection (via anti-body detection) and I thought we might
actually be able to establish a meaningful level of "herd
immunity". Also the "experiment" that is Sweden seems somewhat
ambiguous... I'm wondering if anyone here with more hands-on experience with network transmission models has thoughts/opinions/ideas on what "herd immunity" means in the context of shifting the shifting valencies as individuals limit the number (and significance) of interactions with others. It seems that by now, there must be some studies/models that try to address that. Also the implication of "superspreader" events, and what actually characterizes such? - Steve On 10/14/20 9:28 AM, cody dooderson
wrote:
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In reply to this post by cody dooderson
Cody - Thanks for the nod... though I'm less confident in this prediction today than I was back in April... though it is interesting to be reminded of what I was thinking (or at least saying) back then! I think there is a lot more interstate mixing than I imagined would result. The mass attendance at Sturgis is a strong example of gather/scatter with no significant contact-tracing... the few attendees in my larger circle only report: "I was there all week and there were no outbreaks while I was there... see! I tole'ya it was a Democrat Hoax!". I think the "return to college" is maybe providing some mixing as well, though I think it is better than the post Spring Break/Mardi Gras 2020 moments. I haven't followed up enough on the modeling referenced back then
to have even the most general idea of how significant the
differing implied levels of herd-immunity might be. I remember
when some of the early broad testing (e.g. whole communities)
began and there was evidence of more widespread (asymptomatic)
infection (via anti-body detection) and I thought we might
actually be able to establish a meaningful level of "herd
immunity". Also the "experiment" that is Sweden seems somewhat
ambiguous... I'm wondering if anyone here with more hands-on experience with network transmission models has thoughts/opinions/ideas on what "herd immunity" means in the context of shifting the shifting valencies as individuals limit the number (and significance) of interactions with others. It seems that by now, there must be some studies/models that try to address that. Also the implication of "superspreader" events, and what actually characterizes such? - Steve On 10/14/20 9:28 AM, cody dooderson
wrote:
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Tentative answer to my own question: https://onlinelibrary.wiley.com/doi/full/10.1002/ajhb.23512
On 10/14/20 10:09 AM, Steve Smith
wrote:
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Also here's a recent Sep 22 IEEE Spectrum with our friend Mikhail Pokopenko featured on ABM approaches later in the article "Why Modeling the Spread of COVID-19 Is So Damn Hard" https://spectrum.ieee.org/artificial-intelligence/medical-ai/why-modeling-the-spread-of-covid19-is-so-damn-hard _______________________________________________________________________ [hidden email] On Wed, Oct 14, 2020 at 11:11 AM Steve Smith <[hidden email]> wrote:
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