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West African Ebola virus epidemic timeline of reported cases and deaths

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NotationTimeline, tables and graphs at the apex of the West African Ebola virus epidemic
Table of graphs and parameters

In March 2014, the World Health Organization (WHO) reported a major Ebola outbreak in Guinea, a western African nation,[1] the disease then rapidly spread to the neighboring countries of Liberia and Sierra Leone with smaller outbreaks occurring in Senegal, Nigeria, and Mali; the resulting West African Ebola virus epidemic is the largest Ebola outbreak (cases and deaths) ever documented.[1]

Background

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Articles related to the
Western African
Ebola virus epidemic
Overview
Nations with widespread cases
Other affected nations
Other outbreaks
Main article: West African Ebola virus epidemic

Researchers believe that a 2-year-old boy who lived in the village of Meliandou, Guéckédou Prefecture, Guinea was the index case of the current Ebola virus disease epidemic. The boy died in December 2013. His mother, sister, and grandmother then became ill with similar symptoms and also died. Although Ebola represents a significant public health problem in sub-Saharan Africa and was documented[2] in Tai Forest chimpanzees, only one case had been reported in humans in West Africa.[3] With this background and in the context of poor public health systems,[4] the early cases were mis-diagnosed as diseases more common to the area. Thus Ebola virus disease spread for several months before it was recognized as such.[5][6] In late October 2014, the boy was later identified as Emile Ouamouno.[7][8] In a Tuesday, December 30, 2014 online world news story article by Richard Ingham from the Agence France-Presse (AFP) that was featured on the MSN homepage, it was revealed that a tree in the area where children had played at, playing with insect-eating free-tailed bats and hunting and grilling them to eat (they are a cousin of another well-known Ebola reservoir, the fruit bat, whose role in this outbreak is not as clear), is believed to be the point where human infection – likely by the bats – with Ebola in this current outbreak occurred, the 'ground zero' of the epidemic. This is not yet known decisively, but scientists have enough knowledge to go public with the story.[9]

Timeline of reported cases and deaths

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See also: Ebola virus epidemic in West Africa timeline

Data sources

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Data comes from reports by the World Health Organization Global Alert and Response Unit[Resource 1] and the WHO's Regional Office for Africa.[Resource 2] All numbers are correlated with United Nations Office for the Coordination of Humanitarian Affairs (OCHA), if available.[Resource 3] The reports are sourced from official information from the affected countries' health ministries. The WHO has stated the reported numbers "vastly underestimate the magnitude of the outbreak", estimating there may be 3 times as many cases as officially reported.[10][11]

Understanding the data and its limitations

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Each row of the table represents the best available information cross-checked from multiple sources on the day it was reported. The data may be inaccurate for the following reasons:[citation needed]

  • Each data source or report may or may not include suspected cases that have not yet been confirmed.
  • Each source or report may or may not include probable cases.
  • Case numbers may be revised downward if a probable or suspected case is later found to be negative. (Numbers may differ from reports as per respective Government reports. See notes at the bottom for stated source file.)
  • The reports usually refer to cumulative data totals since the start of the 2014 epidemic. When new data becomes available or old data is revised the correction could apply either to the past or the present.
  • The number of deaths may be revised downwards if it is later found from testing those deaths were not from Ebola.
  • There are variable delays in gathering, correcting and reporting the data from multiple sources.
  • It is not possible to infer the rate of growth or decline in the spread of the disease from the cumulative data or the graphs; they simply reflect a timeline of the available data as reported on any given date. The real-world spread could be slowing while reported cumulative cases rise at a faster rate due to improved reporting, or the real-world spread could be increasing with flat cumulative data due to lack of reporting.

Graphs

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  • Cumulative totals of cases and deaths over time
    Cumulative totals of cases and deaths over time
  • Cumulative totals in log scale
    Cumulative totals in log scale
  • Cases per day in linear scale
    Cases per day in linear scale
  • Cumulative number of cases by country, using a linear scale
    Cumulative number of cases by country, using a linear scale
  • Cumulative number of cases by country, using a logarithmic scale
    Cumulative number of cases by country, using a logarithmic scale
  • Cases based on population, using a linear scale
    Cases based on population, using a linear scale
  • Cases based on population, using a logarithmic scale
    Cases based on population, using a logarithmic scale
  • Weekly cases, total and per country
    Weekly cases, total and per country

Tables

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Major Ebola virus outbreaks by country and by date – 30 July 2015 to most recent WHO / Gov update
Note: Cases include confirmed, probable and suspected per the WHO, numbers are the cumulative figures as published on the given date, and due to retrospective revisions differences between successive weekly totals are not necessarily the number of new cases that week.
Date Total Guinea Guinea Liberia Liberia Sierra Leone Sierra Leone Sources
Cases Deaths Cases Deaths Cases Deaths Cases Deaths
25 Nov 2015 28,637 11,314 3,804 2,536 10,675 4,808 14,122 3,955 [note 1][13]
18 Nov 2015 28,634 11,314 3,804 2,536 10,672 4,808 14,122 3,955 [note 2][14]
11 Nov 2015 28,635 11,314 3,805 2,536 10,672 4,808 14,122 3,955 [note 3][15]
4 Nov 2015 28,607 11,314 3,810 2,536 10,672 4,808 14,089 3,955 [note 4][16]
25 Oct 2015 28,539 11,298 3,806 2,535 10,672 4,808 14,061 3,955 [note 5][17]
18 Oct 2015 28,476 11,298 3,803 2,535 10,672 4,808 14,001 3,955 [18]
11 Oct 2015 28,454 11,297 3,800 2,534 10,672 4,808 13,982 3,955 [note 6][19]
27 Sep 2015 28,388 11,296 3,805 2,533 10,672 4,808 13,911 3,955 [20]
20 Sep 2015 28,295 11,295 3,800 2,532 10,672 4,808 13,823 3,955 [21]
13 Sep 2015 28,220 11,291 3,792 2,530 10,672 4,808 13,756 3,953 [22]
6 Sep 2015 28,147 11,291 3,792 2,530 10,672 4,808 13,683 3,953 [23]
30 Aug 2015 28,073 11,290 3,792 2,529 10,672 4,808 13,609 3,953 [24]
16 Aug 2015 27,952 11,284 3,786 2,524 10,672 4,808 13,494 3,952 [25]
9 Aug 2015 27,929 11,283 3,787 2,524 10,672 4,808 13,470 3,951 [26]
26 Jul 2015 27,748 11,279 3,786 2,520 10,672 4,808 13,290 3,951 [27]
12 Jul 2015 27,642 11,261 3,760 2,506 10,673 4,808 13,209 3,947 [28]
5 Jul 2015 27,573 11,246 3,748 2,499 10,670 4,807 13,155 3,940 [note 7][29][30]
28 Jun 2015 27,514 11,220 3,729 2,482 10,666 4,806 13,119 3,932 [31]
21 Jun 2015 27,443 11,207 3,718 2,473 10,666 4,806 13,059 3,924 [32]
14 Jun 2015 27,305 11,169 3,674 2,444 10,666 4,806 12,965 3,919 [33]
31 May 2015 27,110 11,132 3,652 2,429 10,666 4,806 12,827 3,912 [34]
17 May 2015 26,898 11,105 3,635 2,407 10,666 4,806 12,632 3,907 [35]
3 May 2015 26,558 10,990 3,589 2,386 10,564 4,716 12,440 3,903 [36]
19 Apr 2015 26,009 10,793 3,565 2,358 10,212 4,573 12,267 3,877 [37]
5 Apr 2015 25,480 10,557 3,515 2,333 9,862 4,408 12,138 3,831 [38]
22 Mar 2015 24,837 10,296 3,429 2,263 9,602 4,301 11,841 3,747 [39]
8 Mar 2015 24,282 9,976 3,285 2,170 ≥9,343 ≥4,162 11,619 3,629 [40]
22 Feb 2015 23,659 9,574 3,155 2,091 9,238 4,037 11,301 3,461 [41]
8 Feb 2015 22,824 9,147 3,044 1,995 ≥8,881 ≥3,826 10,934 3,341 [42]
25 Jan 2015 22,022 8,780 2,917 1,910 8,622 3,686 10,518 3,199 [43]
11 Jan 2015 21,226 8,399 2,806 1,814 8,331 3,538 10,124 3,062 [44]
28 Dec 2014 20,171 7,890 2,707 1,709 8,018 3,423 9,446 2,758 [45]
14 Dec 2014 18,565 7,273 2,415 1,525 7,819 3,346 8,356 2,417 [46][47][48]
30 Nov 2014 17,110 6,397 2,164 1,325 7,653 3,157 7,312 1,915 [49][50][51]
18 Nov 2014 15,291 5,765 2,047 1,214 7,082 2,963 6,190 1,598 [52][53]
2 Nov 2014 13,015 5,188 1,731 1,041 6,525 2,697 4,759 1,450 [54][55]
19 Oct 2014 9,911 4,890 1,540 926 4,665 2,705 3,706 1,259 [56]
12 Oct 2014 8,950 4,476 1,472 843 4,249 2,458 3,252 1,183 [57]
28 Sep 2014 7,169 3,278 1,157 710 3,696 1,998 2,317 570 [58][59]
14 Sep 2014 5,327 2,578 942 601 2,720 1,461 1,655 516 [60][61][62]
31 Aug 2014 3,664 1,794 771 494 1,698 871 1,216 436 [63][64]
16 Aug 2014 2,225 1,225 543 394 834 466 848 365 [65]
9 Aug 2014 1,835 1,011 506 373 599 323 730 315 [66]
30 Jul 2014 1,437 825 472 346 391 227 574 252 [67]
23 Jul 2014 1,201 672 427 319 249 129 525 224 [68]
14 Jul 2014 982 613 411 310 174 106 397 197 [69]
2 Jul 2014 779 481 412 305 115 75 252 101 [70]
17 Jun 2014 528 337 398 264 33 24 97 49 [71]
27 May 2014 309 202 281 186 12 11 16 5 [72]
12 May 2014 260 182 248 171 12 11 – – [73][74]
1 May 2014 239 160 226 149 13 11 – – [75]
14 Apr 2014 176 110 168 108 8 2 – – [76]
31 Mar 2014 130 82 122 80 8 2 – – [77]
22 Mar 2014 49 29 49 29 – – – – [78]
Minor Ebola virus outbreaks by country and by date – 30 July 2014 to most recent WHO / Gov update
Date Total Nigeria Nigeria Senegal Senegal United States USA Spain Spain Mali Mali United Kingdom U.K. Italy Italy Refs
Cases Deaths Cases Deaths Cases Deaths Cases Deaths Cases Deaths Cases Deaths Cases Deaths Cases Deaths
4 Nov 2015 36 15 20 8 1 0 4 1 1 0 8 6 1 0 1 0 [note 8][24]
13 May 2015 36 15 20 8 1 0 4 1 1 0 8 6 1 0 1 0 [note 9][79]
29 Dec 2014 35 15 20 8 1 0 4 1 1 0 8 6 1 0 – – [note 10][45]
14 Dec 2014 32 15 20 8 1 0 4 1 1 0 6 6 – – – – [46]
2 Nov 2014 27 10 20 8 1 0 4 1 1 0 1 1 – – – – [54]
19 Oct 2014 25 9 20 8 1 0 3 1 1 0 - – – – – – [56]
12 Oct 2014 23 8 20 8 1 0 1 0 1 0 - – – – – – [57]
28 Sep 2014 22 8 20 8 1 0 1 0 - – - – – – – – [58]
31 Aug 2014 22 7 21 7 1 0 – – - – - – – – – – [63]
16 Aug 2014 15 4 15 4 – – - – - – - – – – – – [65]
9 Aug 2014 13 2 13 2 – – - – - – – – – – – – [66]
30 Jul 2014 3 1 3 1 – – – – - – – – – – – – [67]

Notes:

  1. ^ 25 Nov: All governments as per WHO.
  2. ^ 18 Nov: All governments as per WHO.
  3. ^ 11 Nov: All governments as per WHO.
  4. ^ 4 Nov: All governments as per WHO.
  5. ^ 25 Oct: All governments as per WHO.
  6. ^ 30 Aug: All governments as per WHO.
  7. ^ 5 July: All governments as per WHO. Liberia as per situation update
  8. ^ No chance in Data from 13 May till 4 Nov
  9. ^ No chance in Data from 29 December till 13 May
  10. ^ 29 December: All governments as per WHO. United Kingdom case dated 29 December.
  • Date is the "as of" date from the reference. A single source may report statistics for multiple "as of" dates.
  • Total cases and deaths before 1 July 2014 are calculated.
  • Numbers with ≥ may not be consistent due to under reporting.

References

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Further reading

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Resources

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  1. ^ "Disease Outbreak News (DONs)". Global Alert and Response (GAR). WHO. Archived from the original on January 25, 2003. Retrieved 11 April 2015.   This website's content changes frequently.
  2. ^ "Disease Outbreak News". Regional Office for Africa. WHO. Archived from the original on 24 April 2015. Retrieved 11 April 2015.   This website's content changes frequently.
  3. ^ "West and Central Africa". HumanitarianResponse.info. OCHA. Retrieved 11 April 2015.
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