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  • Originally posted by JPtheBeasta View Post
    My disclaimer is that I am learning a lot of this on the fly with the rest of the armchair epidemiologists out there and reserve the right to be wrong on the math or missing nuances of the calculations. I thought the above would be interesting to share, at least.
    It was a good post. The only clarification I would make is that R0 (nought) doesn't change over time. It's the reproductive number when all people are susceptible, i.e., at the start of an outbreak. The (simplified) formula to calculate how many in the population (%) need to acquire immunity to achieve herd immunity (either by infection or immunization) is 1-1/R0 .. Edit: I just noticed you mentioned the formula. Missed it the first time around.

    The effective reproductive number (Re, also written as Rt) is realtime and is what changes over time (due to the things you mentioned).

    A very good site to see the state by state breakdowns of Rt is https://rt.live. Just like real time RPI, but for pandemics!


    Never in my wildest thoughts did I ever think these esoteric epidemiological terms would become commonplace discussion topics. Yet here we are.
    Last edited by caduceus; 06-26-2020, 12:24 AM.

    Comment


    • https://www.theatlantic.com/health/a...ahMIBejdBBXz5o

      THis is worth reading but partially explains the dissonance in data presented by different sources. CDC is often criticized as to their accuracy by me for the past several months. SOme of this explains why. Also though the CDC has become politically infested mor so since the last administration. Everything with a grain of salt......

      Comment


      • This article describes the complications for Kansas State football's team getting workouts and practices started.


        https://www.nytimes.com/2020/06/25/s...rus-cases.html
        .
        .
        .
        "thnk god for few" jazzdelmar(12/12/11 12:50pm)
        .
        "When most of us couldn't buy a basket. Where do we get off anyway?!" siliconzag (11/17/06 5:45:41 pm)
        .
        I am monitoring the price of a donut
        .

        Comment


        • Cad, I have gotten more solid distilled info from your posts than any other one-spot shop. Thanks, I know they take a ton of time.

          In the Sun-belt, we're getting hammered. My state hit a new record yesterday and it was near double the previous record, hospital space is almost gone and our state director of public health said we could look like NYC if things don't turn very quickly. Houston is likely worse.

          The newest on vaccine development is highly promising, lots of reasons for optimism. But anyone who thinks a vaccine is going to have an impact prior to the end of the year is just dreaming things away, which is how we got to this point in the first place and why the world has literally passed us by. Link:

          The Duke team emphasized that any expectation for a vaccine by the end of this year is overly optimistic.

          "I think it's entirely possible that a vaccine will be approved this year, but not at scale," Ridley explained. "We might have some people vaccinated this year, but the average person won't be vaccinated."

          Denny added, "We may have some good science by the end of the year and think we have some leading candidates. But manufacturing them to have it all administered, that's a tall order to be ready by the beginning of 2021."
          I think that if everyone does the right thing and we all work together, we may start "getting out of this" late next spring and summer, hopefully with less than 250,000 dead. That appears to me to be "the best case scenario," given that we've blown the best chance we had.

          Thanks, Cad.
          Whenever you find yourself on the side of the majority, it is time to pause and reflect.
          Mark Twain.

          Comment


          • Sylean - clearly you are unhappy about the stay-at-home orders. But, your post ignores the fact that death is not the only bad consequence of this disease. Younger people who have contracted the disease have developed lung and other problems that will plague them for the rest of their life. There is a related syndrome being found in children that causes significant health issues. I understand the economic arguments about the stay-at-home orders, but think about the economic impact of coming out of Covid-19 with a health-impaired population.

            Sometimes we have to look at the greater good, not just our self-serving wants, and do something that is unselfish. In my opinion, staying home as much as possible, washing hands thoroughly, and wearing a mask when you are out are those unselfish somethings right now.

            Comment


            • Originally posted by caduceus View Post
              It was a good post. The only clarification I would make is that R0 (nought) doesn't change over time. It's the reproductive number when all people are susceptible, i.e., at the start of an outbreak. The (simplified) formula to calculate how many in the population (%) need to acquire immunity to achieve herd immunity (either by infection or immunization) is 1-1/R0 .. Edit: I just noticed you mentioned the formula. Missed it the first time around.

              The effective reproductive number (Re, also written as Rt) is realtime and is what changes over time (due to the things you mentioned).

              A very good site to see the state by state breakdowns of Rt is https://rt.live. Just like real time RPI, but for pandemics!


              Never in my wildest thoughts did I ever think these esoteric epidemiological terms would become commonplace discussion topics. Yet here we are.

              Cad,

              Is the R-0 generally given as a specific number or narrow range everywhere in the world for a novel pandemic?

              Or is it localized based on population density, mass transit use, weather, habits (masks tolerance) etc?

              I know those things would impact the R-e, but isn’t the reproductive number when all people are susceptible (R-0) still largely a function of human behavior or natural environment? Even what month it is? Is R-0 determined via an average of some of these factors?

              Comment


              • Originally posted by DZ View Post
                Cad, I have gotten more solid distilled info from your posts than any other one-spot shop. Thanks, I know they take a ton of time.

                In the Sun-belt, we're getting hammered. My state hit a new record yesterday and it was near double the previous record, hospital space is almost gone and our state director of public health said we could look like NYC if things don't turn very quickly. Houston is likely worse.

                The newest on vaccine development is highly promising, lots of reasons for optimism. But anyone who thinks a vaccine is going to have an impact prior to the end of the year is just dreaming things away, which is how we got to this point in the first place and why the world has literally passed us by. Link:



                I think that if everyone does the right thing and we all work together, we may start "getting out of this" late next spring and summer, hopefully with less than 250,000 dead. That appears to me to be "the best case scenario," given that we've blown the best chance we had.

                Thanks, Cad.
                Hi Dix (changed username?),

                Sorry to hear that you are now in the eye of the storm. I see that Texas is now reversing course and implementing some (far overdue but weak sauce) measures again. Florida seems to be going for the record. I've been watching the incidence curves, and it's looking ugly for several states. It's distressing. Pandemics generally follow a logistic curve (cases go up linearly for a while, but when you reach a certain threshold, watch out because things go exponential and start doubling very quickly). Outside of mandatory masking and going back to lockdown, I don't see much else that can be done at this point. Sigh. Masks are cheap and easy. Lockdown is not.

                The vaccine issue has been an interesting one. I've been amazed that there are clinical trials now in phase III (testing for efficacy with large numbers of subjects). Normally that takes years. I agree that having a safe and effective vaccine, and enough doses to make a dent, ready by the end of the year is probably a pipe dream. Oxford has been saying September for theirs. That would be herculean, but obviously welcome if true.

                Ironically, I've wondered if our savior might actually come from the place where it all started -- China. They've been known to move mountains within their society (not always with good ethical standards). Coupled with their massive manufacturing capability, it wouldn't surprise me if a fast(ish)-tracked vaccine came out of there. We'll see.

                Stay safe.

                Comment


                • Originally posted by LTownZag View Post
                  Cad,

                  Is the R-0 generally given as a specific number or narrow range everywhere in the world for a novel pandemic?

                  Or is it localized based on population density, mass transit use, weather, habits (masks tolerance) etc?

                  I know those things would impact the R-e, but isn’t the reproductive number when all people are susceptible (R-0) still largely a function of human behavior or natural environment? Even what month it is? Is R-0 determined via an average of some of these factors?
                  It's regional, and yes, depends on conditions on the ground and in society in that locale. I don't know about seasonality although I would assume not, since that adds a time factor to the calculation. As far as I know, initial R0 calculations involve some modeling and pretty complex math. I'm not an expert in that department.

                  Comment


                  • Originally posted by caduceus View Post
                    It's regional, and yes, depends on conditions on the ground and in society in that locale. I don't know about seasonality although I would assume not, since that adds a time factor to the calculation. As far as I know, initial R0 calculations involve some modeling and pretty complex math. I'm not an expert in that department.
                    Need mulitfactor stepwise descriminant analysis to weight the importance of each of multiple factors. That is coming from the math/statistics dept..

                    Comment


                    • Originally posted by caduceus View Post
                      Hi Dix (changed username?),

                      Sorry to hear that you are now in the eye of the storm. I see that Texas is now reversing course and implementing some (far overdue but weak sauce) measures again. Florida seems to be going for the record. I've been watching the incidence curves, and it's looking ugly for several states. It's distressing. Pandemics generally follow a logistic curve (cases go up linearly for a while, but when you reach a certain threshold, watch out because things go exponential and start doubling very quickly). Outside of mandatory masking and going back to lockdown, I don't see much else that can be done at this point. Sigh. Masks are cheap and easy. Lockdown is not.

                      The vaccine issue has been an interesting one. I've been amazed that there are clinical trials now in phase III (testing for efficacy with large numbers of subjects). Normally that takes years. I agree that having a safe and effective vaccine, and enough doses to make a dent, ready by the end of the year is probably a pipe dream. Oxford has been saying September for theirs. That would be herculean, but obviously welcome if true.

                      Ironically, I've wondered if our savior might actually come from the place where it all started -- China. They've been known to move mountains within their society (not always with good ethical standards). Coupled with their massive manufacturing capability, it wouldn't surprise me if a fast(ish)-tracked vaccine came out of there. We'll see.

                      Stay safe.
                      Trusting China doesn't seem to be a very good evolutionary strategy.

                      They lied from the beginning. Tried to cover it up by disappearing people trying to warn the world, produced testing kits that routinely gave false readings, sent PPE around the world that was substandard, etc.

                      If they come up with a vaccine, I wouldn't want to be the lab rat they tested it on.

                      Comment


                      • Ain't gonna be no 2020-2021 season y'all. Better get used to that idea now.
                        "You miss 100% of the shots you don't take."
                        -Zach Norvell Jr.

                        Comment


                        • Originally posted by hockeyzag View Post
                          Ain't gonna be no 2020-2021 season y'all. Better get used to that idea now.
                          I do think some COVID-controlled countries (Australia /NZ , China?) may see some current Zags playing professionally in lieu of sitting in domestic quarantine.

                          Comment


                          • Originally posted by DZ View Post
                            Cad, I have gotten more solid distilled info from your posts than any other one-spot shop. Thanks, I know they take a ton of time.

                            In the Sun-belt, we're getting hammered. My state hit a new record yesterday and it was near double the previous record, hospital space is almost gone and our state director of public health said we could look like NYC if things don't turn very quickly. Houston is likely worse.

                            The newest on vaccine development is highly promising, lots of reasons for optimism. But anyone who thinks a vaccine is going to have an impact prior to the end of the year is just dreaming things away, which is how we got to this point in the first place and why the world has literally passed us by. Link:



                            I think that if everyone does the right thing and we all work together, we may start "getting out of this" late next spring and summer, hopefully with less than 250,000 dead. That appears to me to be "the best case scenario," given that we've blown the best chance we had.

                            Thanks, Cad.
                            Cad I also wanted to thank you for all the time and effort you have put into enlightening us about COVID19. As Dixie stated, you spend an enormous amount of time explaining your knowledge...THANKS!!!

                            Dixie,

                            I just finished listening to the Governor of South Carolina explain why he can't mandate people to where face masks/coverings and he said it isn't enforceable...

                            Italy and Spain had the highest death rates...around 18-20% are figures that come to mind; however, their governments came out strongly about staying home, wearing face masks/coverings and social distancing. Both of those countries have somewhat "recovered" from this contagion and are resuming normal activities.

                            People in this country do not want to work together to over come this common goal of curtailing this virus. We all should know there is no "I" in the word TEAM but there are just so many people here that are worried about their individual rights and not concerned about the rights of All...Our "leaders" spout how they are limiting testing and don't even want to include the wearing of face masks/coverings as a priority. Without solid leadership, how can this country unite to "fight" the virus...This isn't about politics but rather the health of our countrymen...




                            It is very sad but I am believing hockeyzag might be right in that we won't have a season this coming year.

                            People are just so selfish...How did Jesus phrase that commandment: "Love your neighbor as yourself!"

                            Comment


                            • Originally posted by DZ View Post
                              Cad, I have gotten more solid distilled info from your posts than any other one-spot shop. Thanks, I know they take a ton of time.

                              In the Sun-belt, we're getting hammered. My state hit a new record yesterday and it was near double the previous record, hospital space is almost gone and our state director of public health said we could look like NYC if things don't turn very quickly. Houston is likely worse.

                              The newest on vaccine development is highly promising, lots of reasons for optimism. But anyone who thinks a vaccine is going to have an impact prior to the end of the year is just dreaming things away, which is how we got to this point in the first place and why the world has literally passed us by. Link:



                              I think that if everyone does the right thing and we all work together, we may start "getting out of this" late next spring and summer, hopefully with less than 250,000 dead. That appears to me to be "the best case scenario," given that we've blown the best chance we had.

                              Thanks, Cad.
                              Cad, I would like to thank you as well. Really appreciate the info and thought processes that go into navigating such a difficult situation.

                              Comment


                              • Originally posted by Bogozags View Post
                                Cad I also wanted to thank you for all the time and effort you have put into enlightening us about COVID19. As Dixie stated, you spend an enormous amount of time explaining your knowledge...THANKS!!!

                                Dixie,

                                I just finished listening to the Governor of South Carolina explain why he can't mandate people to where face masks/coverings and he said it isn't enforceable...

                                Italy and Spain had the highest death rates...around 18-20% are figures that come to mind; however, their governments came out strongly about staying home, wearing face masks/coverings and social distancing. Both of those countries have somewhat "recovered" from this contagion and are resuming normal activities.

                                People in this country do not want to work together to over come this common goal of curtailing this virus. We all should know there is no "I" in the word TEAM but there are just so many people here that are worried about their individual rights and not concerned about the rights of All...Our "leaders" spout how they are limiting testing and don't even want to include the wearing of face masks/coverings as a priority. Without solid leadership, how can this country unite to "fight" the virus...This isn't about politics but rather the health of our countrymen...




                                It is very sad but I am believing hockeyzag might be right in that we won't have a season this coming year.

                                People are just so selfish...How did Jesus phrase that commandment: "Love your neighbor as yourself!"

                                I ask the question, “Am I the only one on this board that thinks like I do or is it you feel I’m a nut?

                                I ask because there are never any comments regarding my posts...

                                Comment

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