Covid-19 Predictions to Brazil

março 16, 2020 § 2 Comentários

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Figure 1: Plot from June 2 (daily death toll).

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Figure 2: Plot from June 2 (daily spreading).total_cases_spreding_prediction-MT11

Figure 3: Plot from March 30 (daily spreading).

NEW UPDATE

Last update: June, 2nd – 1:10 p.m.

The plots above comprise data from World Health Organization (WHO) and was organized by Our World in Data (https://ourworldindata.org/coronavirus-source-data). Since March, 18th I’m updating the data based on information provided by the brazilian Ministry of Health.  They are from a predictive modeling I devised based on Taylor series (https://en.wikipedia.org/wiki/Taylor_series#Calculation_of_Taylor_series) using the first and second derivatives of the continuous approximation of the usage data.

Beginning on April 15 it will also be available the forecast for the number of deaths. Figure 1 shows this particular plot. More importantly though is the growth rate, particularly how fast the number of deaths is doubling. By June 30 the number of deaths will be around 80,983. If the forecast pattern continues as it is now, the doubling growth rate will be around 19 days.

Figure 2 shows the daily spreading forecast based on the last 24 hours . Figure 3 represents data updated on March 30th and contains the number of cases released at that point. I decided to keep it for comparison purposes only. It shows a S-shape (sigmoid growth curve), which I hope we soon see more often (and it actually appeared at that moment). A sigmoid curve represents an acceleration phase (meaning an exponential growth), with a change to linear growth (which would mean a stability  in the number of cases).  As we can see, the curve at Figure 2 shows a J-shape, meaning that the rate of change (known as derivative) of the number of cases with respect to time is proportional to the number of cases itself.

In plain mathematics, it is still growing at expfunc, an exponential function .

If the pattern continues as it is now, I’m forecasting that by June 30 it will be about 2,053,003 cases. Mortality rate (total deaths/total cases) around 3.9%. The range the authorities are working as the coronavirus peak in Brazil is May/June, with no particular date due to a sub notification problem which hinders an overview. I created a repo  on GitHub with the whole csv file (last forecast data is July 15), click here to view.

P.S.: I will keep a daily update to calibrate the model and also a list below with the previous predictions.

Previous Predictions

  • Updated on May 28th and comprises data up to May 27th: 533,236 cases (the actual number was 514,849), with 31,311 deaths (the actual number was 29,314) on May, 31st.
  • Updated on May 26th and comprises data up to May 25th: 454,764 cases on May, 31st.
  • Updated on May 25th and comprises data up to May 24th: 470,562 cases on May, 31st.
  • Updated on May 22nd and comprises data up to May 21st: 470,562 cases, with 55,177 deaths on May, 31st.
  • Updated on May 20th and comprises data up to May 19th: 901,663 cases, with 52,403 deaths on May, 31st.
  • Updated on May 18th and comprises data up to May 17th: 901,663 cases, with 82,480 deaths on May, 31st.
  • Updated on May 11th and comprises data up to May 10th: 646,436 cases, with 48,399 deaths on May, 31st.
  • Updated on May 8th and comprises data up to May 7th: 563,524 cases, with 26,914 deaths on May, 31st.
  • Updated on May 7th and comprises data up to May 6th: 413,014 cases, with 120,915 deaths on May, 31st.
  • Updated on May 5th and comprises data up to May 5th: 2,619,918 cases, with 175,398 deaths on May, 31st.
  • Updated on May 4th and comprises data up to May 4th: 110,501 cases (the actual number was 114,715) , with 7,565 deaths (the actual number was 7,921) on May, 5th.
  • Updated on May 1st and comprises data up to May 1st: 136,501 cases, with 7,972 deaths on May, 5th.
  • Updated on April 30th and comprises data up to April 30th: 135,495 cases, with 7,960 deaths on May, 5th.
  • Updated on April 29th and comprises data up to April 29th: 135,570 cases, with 14,158 deaths on May, 5th.
  • Updated on April 28th and comprises data up to April 28th: 125,474 cases, with 11,787 deaths on May, 5th.
  • Updated on April 27th and comprises data up to April 27th: 173,173 cases, with 14,640 deaths on May, 5th.
  • Updated on April 25th and comprises data up to April 25th: 247,286 cases, with 7,781 deaths on May, 5th.
  • Updated on April 24th and comprises data up to April 24th: 94,249 cases, with 8,157 deaths on May, 5th.
  • Updated on April 22th and comprises data up to April 22th: 148,040 cases, with 11,291 deaths on May, 5th.
  • Updated on April 20th and comprises data up to April 19th: 41,217 cases (the actual number was 40,581), with 2,658 deaths (the actual number was 2,575) on April, 20th.
  • Updated on April 17th and comprises data up to April 17th: 52,837 cases (with 3,009 deaths) on April, 20th.
  • Updated on April 15th and comprises data up to April 15th: 63,167 cases (with 2,931 deaths) on April, 20th.
  • Updated on April 14th and comprises data up to April 14th: 51,319 cases on April, 20th.
  • Updated on April 13th and comprises data up to April 13th: 37,947 cases on April, 20th.
  • Updated on April 11th and comprises data up to April 11th: 48,608 cases on April, 20th.
  • Updated on April 10th and comprises data up to April 10th: 50,880 cases on April, 20th.
  • Updated on April 9th and comprises data up to April 9th: 40,279 cases on April, 20th.
  • Updated on April 8th and comprises data up to April 8th: 78,107 cases on April, 20th.
  • Updated on April 6th and comprises data up to April 6th: 39,459 cases on April, 20th.
  • Updated on April 4th and comprises data up to April 4th: 11,572 cases on April, 5th (the actual number was 11,281) and 39,864 on April, 20th.
  • Updated on April 3rd and comprises data up to April 3rd: 11,608 cases on April, 5th and 41,958 on April, 20th.
  • Updated on April 2nd and comprises data up to April 2nd: 11,008 cases on April, 5th and 23,700 on April, 20th.
  • Updated on April 1st and comprises data up to April 1st: 11,600 cases on April, 5th and 35,522 on April, 20th.
  • Updated on March 31st and comprises data up to March, 31st: 25,654 cases on April, 5th and 228,893 on April, 20th.
  • Updated on March 30th and comprises data up to March, 30th: 6,352 cases on April, 5th and 9,542 on April, 20th.
  • Updated on March 27th and comprises data up to March, 27th: 12,670 cases on April, 5th and 47,113 on April, 20th.
  • Updated on March 25th and comprises data up to March, 25th: 2,843 cases on March, 26th (the actual number was 2,915) and 6,672 on April, 5th.
  • Updated on March 25th and comprises data up to March, 24th: 3,113 cases on March, 26th and 14,331 on April, 5th.
  • Updated on March 23rd and comprises data up to March, 23rd: 3,999 cases on March, 26th and 24,311 on April, 5th.
  • Updated on March 22nd and comprises data up to March, 22nd: 5,622 cases on March, 26th and 32,784 on April, 5th.
  • Updated on March 21st and comprises data up to March, 20th: 4,929 cases on March, 26th and 20,558 on April, 5th.
  • Updated on March, 20th and comprises data up to March, 19th: 2,255 cases on March, 26th and 5,601 on April, 5th.
  • Dataset downloaded on March, 18th and comprises data up to March, 17th: 2,690 cases on March, 26th.
  • Dataset downloaded on March, 16th and comprising data up to March, 16th: 4,554 cases on March, 26th.

Onde estou?

Você está atualmente visualizando os arquivos para março, 2020 em Marcelo Tibau.