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Add changes suggested by @SiminaB #789

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@rando2 rando2 commented Jan 19, 2021

Description of the proposed additions or changes

@SiminaB sent me proposed changes by email.
Hopefully this is a faithful representation of all the feedback!

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  • Text is formatted so that each sentence is on its own line.
  • Pre-prints cited in this pull request have a GitHub issue opened so that they can be reviewed.

@rando2 rando2 added pathogenesis Text for Review Feedback on this text is welcome! labels Jan 19, 2021
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Feedback from @SiminaB and my responses to a couple of things. I need to dig into a lot of the deeper comments, and would love to hear what others think (perhaps @LucyMcGowan for the IFR & other modeling questions, @rays1987 and/or @bansalvi for the omics?)

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Comment on lines 66 to 67
A) The genomic structure of coronaviruses is highly conserved, including the order and organization of genes such as the spike (S), envelope (E), membrane (M) and nucleocapsid (N) proteins.
B) The physical structure of the coronavirus virion, including the components encoded by conserved genes S, E, M and N.
B) The physical structure of the coronavirus virion, including the components encoded by conserved genes S, E, M and N.
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@SiminaB says:

This caption only seems to focus on the 3rd region. Should provide more details for ORF1a and ORF2b. ORF1b has the replicase, but what about the proteases? What are they used for? (I mean, I know they break down proteins, but what does the virus use them for?)

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See edits above

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R~0~ and the timescale of infection (measured by the infectious period and the exposed period) govern population-level epidemic dynamics, with R~0~ being one of the most important epidemiological parameters [@isbn:9780691116174].
R~0~ is the average number of new (secondary) infections caused by one infected person, assuming a wholly susceptible population [@doi:10.1111/j.1467-9574.1996.tb01482.x].
A simple mechanistic model used to describe infectious disease dynamics is a susceptible-infected-recovered (SIR) compartmental model.
In this formulation individuals move through three states: susceptible, infected, and recovered; two parameters, $\gamma$ and $\beta$, specify the rate at which the infectious recover, and the infection transmission rate, respectively.
In this simple formulation, R~0~ is estimated as the ratio of $\beta$ and $\gamma$.[@doi:10.1126/science.abb5659; @isbn:9780691116174].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
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@SiminaB says:

I’m a bit unclear on this. It only takes 1 person to be infected. I know that if Rt < 1 eventually the infectious dies down, but I’m confused on this issue of “invading a susceptible population”.

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I'm tagging @LucyMcGowan, @alavendelm, and @rdvelazquez for help on this one! I think I understand the idea being communicated but I'm not sure exactly how to adjust the phrasing.

R~0~ and the timescale of infection (measured by the infectious period and the exposed period) govern population-level epidemic dynamics, with R~0~ being one of the most important epidemiological parameters [@isbn:9780691116174].
R~0~ is the average number of new (secondary) infections caused by one infected person, assuming a wholly susceptible population [@doi:10.1111/j.1467-9574.1996.tb01482.x].
A simple mechanistic model used to describe infectious disease dynamics is a susceptible-infected-recovered (SIR) compartmental model.
In this formulation individuals move through three states: susceptible, infected, and recovered; two parameters, $\gamma$ and $\beta$, specify the rate at which the infectious recover, and the infection transmission rate, respectively.
In this simple formulation, R~0~ is estimated as the ratio of $\beta$ and $\gamma$.[@doi:10.1126/science.abb5659; @isbn:9780691116174].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
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Suggested change
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].

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Co-authored-by: Anthony Gitter <agitter@users.noreply.github.com>
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@SiminaB, I tried to address as much as your feedback as I could! There was at least one question I wasn't sure of, though.

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R~0~ and the timescale of infection (measured by the infectious period and the exposed period) govern population-level epidemic dynamics, with R~0~ being one of the most important epidemiological parameters [@isbn:9780691116174].
R~0~ is the average number of new (secondary) infections caused by one infected person, assuming a wholly susceptible population [@doi:10.1111/j.1467-9574.1996.tb01482.x].
A simple mechanistic model used to describe infectious disease dynamics is a susceptible-infected-recovered (SIR) compartmental model.
In this formulation individuals move through three states: susceptible, infected, and recovered; two parameters, $\gamma$ and $\beta$, specify the rate at which the infectious recover, and the infection transmission rate, respectively.
In this simple formulation, R~0~ is estimated as the ratio of $\beta$ and $\gamma$.[@doi:10.1126/science.abb5659; @isbn:9780691116174].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
A pathogen can invade a susceptible population only if R~0~ > 1 [@isbn:9780691116174; @isbn:9780199209996].
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I'm tagging @LucyMcGowan, @alavendelm, and @rdvelazquez for help on this one! I think I understand the idea being communicated but I'm not sure exactly how to adjust the phrasing.

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AppVeyor build 1.0.2794 for commit 6214578 is now complete.

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rando2 commented Jan 22, 2021

@SiminaB tagging you just to make sure my answers to your questions seem OK! @ajlee21 (not formally a virologist but more virology background than either of us!) is also going to take a look through everything!

cgreene and others added 3 commits January 22, 2021 08:48
ajlee21 and others added 14 commits January 23, 2021 17:13
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
Co-authored-by: HM Rando <halie.rando@pennmedicine.upenn.edu>
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Co-authored-by: Alexandra Lee <alexjlee.21@gmail.com>
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ajlee21 commented Jan 24, 2021

Thanks for all your responses. These make sense to me, especially the one about the time course of the virus ..much clearer!

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Left a few minor comments that @rando2 nicely addressed

Everything else looks good to me

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@rando2 rando2 merged commit 1a0933d into greenelab:master Jan 25, 2021
@rando2 rando2 deleted the simina_edits branch January 25, 2021 13:59
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rando2 commented Jan 25, 2021

Hi @bansalvi I saw your comment in my email but can't find it here -- could you open a PR to do that? I can make sure it gets merged in before submission this morning!!!

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