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covid-19's Issues

Source of parameters and citations

General question:

Are these parameters being sourced on a pull request basis or is someone actively reading through the literature to get the estimates?

Because over the past few days, I've seen a few China CDC reports which are very comprehensive. It would be useful to include them if they're not already there. For some of these estimates, having an 'N' (number of patients) will be useful and somewhat essential when we try to use the most reliable one.

Finally, I am more comfortable with seeing 'XYZ et al.' as a way of citing them rather than the University (since a lot of the research is collaborative).

Estimates: Cumulative case counts

The first numbers in the estimates readme.md is 'Cumulative case counts'. My understanding is these are total infections (including undetected ones).

Firstly, these have an 'expiration date', and date when the estimate was done. Also what is being estimated varies widely across the papers. So would be better to have something like 'reporting rate' or 'detection rate', which has better utility for model-builders.

Mention to of historic influenza ?

en wikipedia org_wiki_Template_Notable_flu_pandemics

Source : https://en.wikipedia.org/wiki/Template:Notable_flu_pandemics

For R0 : https://en.wikipedia.org/wiki/Template:Notable_flu_pandemics#cite_note-4

  • Biggerstaff, Matthew; Cauchemez, Simon; Reed, Carrie; Gambhir, Manoj; Finelli, Lyn (2014-09-04). "Estimates of the reproduction number for seasonal, pandemic, and zoonotic influenza: a systematic review of the literature". BMC Infectious Diseases. 14 (1): 480. doi:10.1186/1471-2334-14-480. ISSN 1471-2334. PMC 4169819. PMID 25186370.

See also your section.

How do we make live data available ?

I'm running an hourly-updated system producing future-prediction coefficients. The output is JSON format.

An example showing it in action is here: https://cryptinc.com/covid19/covid19_predictor.html

It would benefit from someone with JavaScript and Charting/Mapping skills turning that data into an interactive tool to help people see what is in their immediate future. So far, it's proving to be accurate to within 3% when looking forward a few days, with good accuracy on mid term predictions as well.

A dozen curated global sources feed the back ends.

Weird value of "death" variable in data/cases/global/

I noticed some weird values of the "death" variable in the line listing data. For example, the 27th case in Japan died at 02/13 but the death variable is 1 in the file 2020_02_18_1800EST_linelist_NIHFogarty.csv and 2020_02_19_1800EST_linelist_NIHFogarty.csv but becomes 1581552000 in all the following files starting from 2/20 to 3/16. There are 50-ish cases with similar issues though with different strange numbers. But interestingly for each case the weird number is consistent based on my partial observation.

Is this weird number indicating a death? My guess is that this input is recorded as the death date but then transformed into an integer accidentally.

visualisation for parameter estimates

Amazing work aggregating the parameter estimates, but for the casual viewer it would be nice to be able to /see/ these values. Perhaps something like this figure could be added to the README.

demo

The code for this figure should be easy to adapt to the other parameters as well if you are interested.

library(dplyr)
library(reshape2)
library(ggplot2)


country_names <- c("China", "Iran", "Singapore")

x <- read.csv("estimates.csv",
              stringsAsFactors = FALSE,
              header = TRUE) %>%
    select(id,
           peer_review,
           name,
           abbreviation,
           units,
           country,
           value,
           lower_bound,
           upper_bound,
           title_publication) %>%
  filter(abbreviation == "R0") %>%
    filter(lower_bound != "Unspecified",
           value != "Unspecified",
           country != "Unspecified") %>%
    mutate(value = as.numeric(value),
           lower_bound = as.numeric(lower_bound),
           upper_bound = as.numeric(upper_bound))

id_order <- x$id[sort.int(x$value, index.return = TRUE)$ix]

nice_theme <- theme(
    panel.background = element_blank(),
    panel.grid.minor.y = element_blank(),
    axis.line = element_line(colour = "black"),
    axis.title = element_text(size = 22),
    axis.text = element_text(size = 16),
    plot.title = element_text(size = 32),
    plot.subtitle = element_text(size = 22),
    legend.background = element_rect(colour = "black"),
    legend.title = element_text(size = 22),
    legend.text = element_text(size = 16),
    legend.key = element_rect(fill = "white")
    )

plot_df <- x
plot_df$plot_id <- factor(plot_df$id, levels = id_order)
plot_df$plot_peer_review <- sapply(plot_df$peer_review, is.na)

ggplot(plot_df,
       aes(x = plot_id,
           y = value,
           ymin = lower_bound,
           ymax = upper_bound,
           colour = country,
           shape = plot_peer_review)) +
  geom_pointrange() +
    geom_hline(yintercept = 1,
               linetype = "dashed") +
    labs(x = "Estimate Identifier",
         y = "Estimate",
         title = "R-naught",
         subtitle = "Basic Reproduction Number",
         colour = "Country",
         shape = "Peer Review\nStatus") +
    coord_flip() +
    nice_theme


## scale_factor <- 2
## ggsave("demo.png",
##        height = scale_factor * 14.8,
##        width = scale_factor * 10.5,
##        units = "cm")

Routine checks

Question: oxford & fogerty line listings

  1. The Oxford set has the most line listings but is not current. Is there another source where a newer version can be found, or is it no longer being maintained?
  2. The NIH Fogerty line listings contains 1400 rows. Is there an explanation somewhere of what this subset of cases consists of?

Thank you very much

Documentation/Conventions

  • Dates on files are publication dates
  • Date format: DD Mon YYYY - e.g., 22 Jan 2020
  • Use Google translate for machine translation.
  • Publish in English and original language.
  • Include a text file of PDF case reports and briefings when possible.
  • Files rather than links for briefings, publications etc. Include origin link to facilitate checking for updates.
  • Try to change special characters in file names. IE write out "beta" etc

Metadata link broken

nCoV-2019 Situation Reports from Johns Hopkins University Center for Health Security (metadata)

The metadata link is leading to 404 error

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