COVID-19 short-term forecasts Deaths 2021-06-04 Latin American Countries


General information

  • Forecasts produced by Jennie Castle, Jurgen Doornik, and David Hendry, researchers at the University of Oxford. These are our forecasts, and should not be considered official forecasts from, or endorsed by, any of: University of Oxford, Oxford Martin School, Nuffield College, or Magdalen College.
  • These forecasts are short term time-series extrapolations of the data. They are not based on epidemiological modelling or simulations. All forecasts are uncertain: their success can only be determined afterwards. Many mitigation strategies are in place, which, if successful, invalidate our forecasts. An explanation of our methods is provided below.
  • A list of notes is below. The most recent note:
    [2021-04-29]The `legacy' download for areas of England is stuck at April 26, so we switched to the newer downloads. The results now include Scotland, Wales, and Northern Ireland. The map, however, only shows England.

Peak increase in estimated trend of Deaths in Latin America 2021-06-04

ArgentinaBahamasBelizeBoliviaBrazilChileColombiaCosta RicaDominican RepublicEcuadorEl SalvadorGuatemalaGuyanaHaitiHondurasJamaicaMexicoPanamaParaguayPeruSurinameTrinidad and TobagoUruguayVenezuela
Peak date (mm-dd)2021-01-182021-05-0212-032021-05-252021-04-062021-03-29 --2021-05-3109-0309-072021-01-032021-02-10 -- --2021-05-052021-04-09 --2021-01-122021-05-31 -- -- --2021-04-172021-05-16
Peak daily increment 249 6 6 77 2995 116 33 22 3440 25 34 46 8 46 110 64 24
Days since peak 137 33 183 10 59 67 4 274 270 152 114 30 56 143 4 48 19
Last total 80411 232 325 14900 470842 29696 90890 4153 3646 20755 2260 8258 403 321 6454 951 228568 6389 9609 185813 332 556 4516 2698
Last daily increment 538 0 0 68 1454 98 537 29 4 49 0 20 3 0 39 0 206 1 111 871 7 19 56 9
Last week 3303 3 1 465 9785 649 3143 191 18 270 19 137 21 19 158 9 5113 20 622 116835 44 86 340 83
Previous peak date10-0108-24 --09-0707-2107-172021-01-2209-2804-1205-1008-0706-05 --07-1207-30 --2021-01-2607-23 --07-23 -- -- --09-20
Previous peak daily increment 2487 8 1439 1066 787 396 18 23 166 11 43 3 35 1259 28 2662 9
Low between peaks 120 0 3 371 37 4 4 14 2 11 5 10 3

Deaths count forecast Latin America (bold red line in graphs) 2021-06-05 to 2021-06-11

DateArgentinaBoliviaBrazilChileColombiaCosta RicaEcuadorGuatemalaGuyanaHondurasMexicoPanamaParaguayPeruSurinameTrinidad and TobagoUruguayVenezuela
2021-06-04 80411 14900 470842 29696 90890 4153 20755 8258 403 6454 228568 6389 9609 185813 332 556 4516 2698
2021-06-05 80720 14970 473500 29750 91460 4165 20810 8277 407 6477 228900 6393 9710 187000 338 574 4570 2712
2021-06-06 80990 14980 474600 29840 91940 4167 20910 8287 411 6516 229000 6400 9810 191600 342 607 4615 2732
2021-06-07 81500 15020 475400 29930 92370 4249 20980 8301 415 6548 229100 6405 9910 193100 349 633 4663 2750
2021-06-08 82070 15070 477700 29950 92760 4280 21050 8317 419 6575 229400 6410 10010 195600 357 656 4713 2765
2021-06-09 82540 15120 480100 29990 93120 4303 21110 8334 423 6600 229700 6414 10110 198200 361 678 4764 2781
2021-06-10 83040 15180 481800 30190 93480 4328 21160 8351 426 6624 230100 6419 10200 200700 367 698 4815 2796
2021-06-11 83540 15240 483400 30280 93810 4356 21210 8369 430 6647 230500 6423 10300 203300 374 717 4868 2810

Deaths count average forecast Latin America (bold black line in graphs) 2021-06-05 to 2021-06-11

DateArgentinaBoliviaBrazilChileColombiaCosta RicaEcuadorGuatemalaGuyanaHondurasMexicoPanamaParaguayPeruSurinameTrinidad and TobagoUruguayVenezuela
2021-06-04 80411 14900 470842 29696 90890 4153 20755 8258 403 6454 228568 6389 9609 185813 332 556 4516 2698
2021-06-05 80850 14960 472600 29790 91380 4167 20810 8277 406 6477 229100 6393 9720 200900 339 573 4570 2712
2021-06-06 81220 15010 473500 29870 91800 4183 20850 8291 409 6497 229400 6399 9830 209800 345 590 4621 2728
2021-06-07 81720 15060 474400 29940 92180 4236 20890 8307 412 6515 229800 6403 9940 218400 352 607 4672 2743
2021-06-08 82250 15120 476500 29980 92550 4266 20920 8325 415 6531 231500 6408 10040 227500 360 625 4725 2758
2021-06-09 82720 15180 478500 30030 92920 4293 20950 8342 418 6547 231900 6413 10150 237100 367 645 4778 2773
2021-06-10 83190 15250 480300 30140 93310 4321 20970 8360 421 6564 232200 6417 10250 247300 373 665 4833 2788
2021-06-11 83710 15300 482300 30200 93670 4352 21000 8379 425 6580 232600 6422 10360 259000 381 688 4887 2803

Further information

  • We believe these forecasts fill a useful gap in the short run. They give an indication of what is likely to happen in the next few days, removing some aspect of surprise. Moreover, a noticeable drop in comparison to the extrapolations could be an indication that the implemented policies are having some impact. It is difficult to understand exponential growth. We hope that these forecasts may help to convince viewers to adhere to the policies implemented by their respective governments, and keep all arguments factual and measured.
  • We use the data repository for the 2019 Novel Coronavirus Visual Dashboard operated by the Johns Hopkins University Center for Systems Science and Engineering. This is updated daily, but we tend to update our forecasts only every other day.
    US state data as of 2020-03-28 is courtesy of the New York Times.
  • We can only provide forecasts of what is measured. If confirmed cases are an underestimate of actual cases, then our forecasts will also be underestimates. No other epidemiological data is used. Data definition and collection differs between countries and may change over time.
  • We will update the methodology as we learn what is happening in the next few days or weeks. Once the number of cases levels off, there is no need to provide these forecasts anymore.
  • Countries where the counts are very low or stable have been omitted.
  • The graphs have dates on the horizontal axis (yyyy-mm-dd) and cumulative counts on the vertical axis. They show
    1. bold dark grey line (with circles): observed counts (Johns Hopkins CSSE);
    2. many light grey lines (with open circles): forecasts using different model settings and starting up to four periods back;
    3. red line (with open circles): single forecasts path using default model settings;
    4. black line (with crosses): average of all forecasts, recentered on the last observation;
    5. thin green lines: some indication of uncertainty around the red forecasts, but we do not know how reliable that is.
    Both the red line forecasts and the black lines are also given in the tables above. These forecasts differ, we are currently inclined to use the average forecasts.
  • The forecasts are constructed as follows:
    1. An overall `trend' is extracted by taking a window of the data at a time. In each window we draw `straight lines' which are selected using an automatic econometric procedure (`machine learning'). All straight lines are collected and averaged, giving the trend.
    2. Forecasts are made using the estimated trend, but we note that this must be done carefully, because simply extrapolating the flexible insample trend would lead to wildly fluctuating forecast. We use the `Cardt' method, which has been found to work well in other settings.
    3. Residuals from the trend are also forecast, and combined with trend forecasts into an overall forecast.
  • Scenario forecasts are constructed very differently: smooth versions of the Chinese experience are matched at different lag lengths with the path of each country. This probably works best from the peak, or the slowdown just before (but we include it for the UK nonetheless).
  • The forecast evaluation shows past forecasts, together with the outcomes (in the grey line with circles).
  • EU-BS is Estonia, Latvia, and Lithuania together.
  • This paper describes the methodology and gives further references. Also available as Nuffield Economics Discussion Paper 2020-W06. Still preliminary is the documentation of the medium term forecasts.

Recent changes and notes

[2021-04-29]The `legacy' download for areas of England is stuck at April 26, so we switched to the newer downloads. The results now include Scotland, Wales, and Northern Ireland. The map, however, only shows England.
[2021-01-07]Slideshow of forecasts, errors, and actuals 2020-06-30 to 2021-01-02: how England lost the battle.
[2020-10-27]Statistical short-term forecasting of the COVID-19 Pandemic (Jurgen Doornik, Jennie Castle, and David Hendry) is now published at the Journal of Clinical Immunology and Immunotherapy. open access
[2020-10-11]Short-term forecasting of the coronavirus pandemic (Jurgen Doornik, Jennie Castle, and David Hendry) is now in press at the International Journal of Forecasting. open access
[2020-10-10]Removed forecasts from the Chinese scenarios, while investigating possibility to use own history from the first wave.
Added information on the previous peak (if present) to the peak tables.
Local forecasts for England: now dropping last four observations.
[2020-07-01] Modified the short-term model to allow for (slowly changing) seasonality. Many countries show clear seasonality after the initial period, likely caused by institutional factors regarding data collection. This seasonality was also getting in the way of peak detection. As a consequence estimates of the peak date may have changed for countries with strong seasonality.
Added forecasts of cumulative confirmed cases for lower tier local authorities of England. The data is available from 2020-07-02 including all tests (pillar one and two). Only authorities with more than 5 cases in the previous week are included.
[2020-06-29] Tables in April included the world, but not the world as we know it (double counting China and the US). So removed the world from those old tables.
Why short-term forecasts can be better than models for predicting how pandemics evolve just appeared at The Conversation.
Thursday 2 July webinar at the FGV EESP - São Paolo School of Economics. This starts at 16:00 UK time (UTC+01:00) and streamed here.
[2020-06-24] Research presentation on short-term COVID-19 forecasting on 26 June (14:00 UK time) at the Quarterly Forecasting Forum of the IIF UK Chapter.
[2020-06-06] Removed Brazil from yesterday's forecasts (only; last observation 2020-06-05).
[2020-06-04] Data issues with confirmed cases for France.
Added an appendix to the short term paper with further forecast comparisons for European and Latin American countries.
Both Sweden and Iran have lost their peak in confirmed cases. For Sweden the previous peak was on 24 April (daily peak of 656 cases), for Iran it was on 31 March (peak of 3116). For Iran this looks like a second wave, with increasing daily counts for the last four weeks. For Sweden this is a sudden jump in confirmed cases in the last two days, compared to a fairly steady weekly pattern over the previous six weeks.
[2020-05-20] Problem with UK confirmed cases: negative daily count. This makes the forecasts temporarily unreliable.
Updated the second paper.
[2020-05-18] Minor fixes to the improved version of scenario forecasting, backported to 2020-05-13.
[2020-05-13] We now omit countries with fewer than 200 confirmed cases in the last week (25 for deaths).
The short-term paper has some small updates, including further comparisons with other models.
Data for Ecuador are not reliable enough for forecasting.
Switched to an improved version of scenario forecasting.
[2020-05-06] The New York Times is in the process of redefining its US state data. Unfortunately, at the moment only the last observation has changed (e.g New York deaths jumped from 19645 on 2020-05-05 to 25956 a day later). This means the data is currently useless; however it does bring it close to the Johns Hopkins/CSSE count (25626 on 2020-05-06). The aggregate US count is based on JH/CSSE so unaffected. We now use Johns Hopkins/CSSE US state data, including all states with sufficient counts. So the new forecasts cannot be compared to those previously.
A minor change is that we show the graph without scenario forecast if no peak has been detected yet.
[2020-04-29] See our blog entry at the International Institute of Forecasters.
US history of death counts revised in Johns Hopkins/CSSE data.
UK death counts have been revised to include the deaths in care homes. In the Johns Hopkins/CSSE data set, which we use, the entire history has been revised. So forecasts made up to 2020-04-29 cannot be compared to later outcomes. In the ECDC data set only the last observation has changed, causing a jump in the series.
[2020-04-27] Our short-term COVID-19 forecasting paper is now available as Nuffield Economics Discussion Paper 2020-W06.
A small adjustment has been made to the scenario forecast methodology, and will be documented shortly.
[2020-04-24] A summary of our work on short-term COVID-19 forecasting appeared as a voxeu.
[2020-04-17] Bird and Nielsen look into nowcasting death counts in England.
[2020-04-16] Added scenario forecasts to all graphs now. This would now be the preferred forecast for most.
This is the first time with a peak in confirmed UK cases (also for deaths, but this is uncertain because it is at the same date).
[2020-04-10] Updated documentation with better description of short-term estimates and peak determination.
[2020-04-09] Added table with estimated peak dates (if happened) and dates to and since the peak. Note that this can be a local peak, and subsequent re-acceleration (or data revisions) can result in a new peak later.
[2020-04-08] Minor correction to peak estimates. Added table with scenario forecasts.
[2020-04-06] Added a post hoc estimate of the peak number of cases. This needs at least three confirmed observations (four for deaths) after the event. It is based on the averaged smooth trend, and can change later or be a local peak. It is marked with a vertical line with the date label, or a date with left arrow in the bottom left corner of the graph. This is backported to 2020-04-04.
[2020-04-02] Now including more US States, based on New York Times data.
[2020-03-31] Scenario forecasts, based on what happened in China earlier this year, are presented for several countries (line marked with x). Created more plausible 90% confidence bands (dotted line in same colour).
[2020-03-26] Scenario forecasts that are based on what happened in China earlier this year, only for Italy.
[2020-03-24] Our forecasts are starting to overestimate in some cases. This was always expected to happen when the increase starts to slow down. Scenario forecasts that are based on what happened in China earlier this year, but only for Italy and Spain sofar.

Initial visual evaluation of forecasts of Deaths