Random Analytics: Ebola 2014 (to 25 Jun 2014)

by Shane Granger

Here are some charts and infographics of the 2014 Ebola Virus Disease outbreak.

Ebola Outbreak (Guinea Prefectures 2014)

01 - Ebola_Guinea_140625

 

***** Please note that this EVD infographic was updated with public source information to 0900hrs 25 June 2014 (EST) *****

The above infographic looks at the breakdowns by Prefecture of EVD cases and fatalities within Guinea. Data sourced from Ebola virus disease, West Africa ā€“ update 23 June 2014.

Ebola Outbreak (Sierra Leone Districts 2014)

02 - Ebola_SierraLeone_140625

 

***** Please note that this EVD infographic was updated with public source information to 0900hrs 25 June 2014 (EST) *****

The above infographic looks at the breakdowns by District of EVD cases and fatalities within Sierra Leone. Data sourced from Ebola virus disease, West Africa ā€“ update 23 June 2014 and the latest Sierra Leone Ministry of Health update (via FluTrackers).

Ebola across Africa

03 - Ebola_AcrossAfrica_140625

 

***** Please note that this EVD infographic was updated with public source information to 0900hrs 25 June 2014 (EST). EVD types are EBOV = Ebola Zaire, SUDV = Ebola Sudan, BDBV = Ebola Bundibugyo and TAFV = Ebola Ivory Coast *****

The Ebola across Africa infographic details the country specific outbreaks of the EVD since it was first discovered in 1976 (with a 1972 retrospective case from Zaire included). As the map shows the bulk of the outbreaks have occurred within central Africa and the most deadly, Ebola Zaire causing the most cases in the Democratic Republic of Congo (formally Zaire). The most recent outbreak has actually occurred in West Africa, originating from Guinea and is a new isolate of Ebola Zaire (Gueckedou and Kissidougou).

As an additional point of interest I have also added the Health Expenditure per capita for each country in 2012 $USD (source: World Bank).

Notes: The 1976 – 2004 outbreaks of Ebola Sudan occurred in the bottom half of Sudan (now South Sudan). Zaire was renamed the Democratic Republic of Congo in 1997.

Ebola (Top 10 Outbreaks by Case Numbers)

04 - Ebola_Top10OutbreaksByCaseNo_140625

***** ***** Please note that this EVD infographic was updated with public source information to 0900hrs 25 June 2014 (EST) *****

The next chart displays the top 10 outbreaks in order of case numbers and each horizontal bar is filled with the flag of the country where the outbreak occurred. With clinical cases reaching 344 in Guinea, 81 in Sierra Leone and 12 in Liberia the EBOV17 coded outbreak has now become largest (437) based on case numbers. The second largest outbreak (SUDV4) was of Ebola Sudan in Uganda (2000) when 425 became infected and 224 died. The recent outbreak is the first to migrate across international land borders. The only other recording of an EVD that jumped borders prior to this outbreak was the 10th worst outbreak (EBOV8) when a doctor caught the disease in Gabon and subsequently took an international flight to South Africa where he became ill and infected other health workers.

Notes: EBV outbreaks in order from lowest to highest. 10th: EBOV8 (Gabon/South Africa), 9th: EBOV9 (Gabon), 8th: EBOV11 (Republic of Congo), 7th: BDBV01 (Uganda), , 6th: EBOV15 (Democratic Republic of Congo), 5th: SUDV1 (technically Sudan but would now be South Sudan), 4th: EBOV6 (Zaire but now the DRC), 3rd: EBOV2 (Zaire but now the DRC), 2nd: SUDV4 (Uganda) and the current, now deadliest outbreak EBOV17 (Guinea/Liberia/Sierra Leone).

Ebola (Cases by Classification and Year)

05 - Ebola_CasesbyClassYear_140625

***** Please note that this EVD infographic was updated with public source information to 0900hrs 25 June 2014 (EST) *****

The final chart shows cases by classification (Ebola Zaire, Sudan, Bundibugyo, Reston and Ivory Coast) by year and then split into those recovered or those deceased (following in a red variant). From 24 June this latest outbreak has become the most significant in terms of case numbers, eclipsing the 1976 dual outbreaks which saw 603 cases and 431 deaths (a combined Case Fatality Rate of 71.5%).

Currently the provisional Western African outbreak has seen 604 cases and 350 deaths (a CFR of 57.9%).

Notes: Several years had just one case. They are 1972 (a retrospective fatality of Ebola Zaire in Zaire), 1977 (a single case of Ebola Zaire in Zaire), 1988 (an accidental infection of Ebola Zaire in Porton Down, UK) and 2011 (a single fatality of Ebola Sudan in Uganda).

Key Facts: (source: Fact Sheet 103, WHO, last updated March 2014)

  • The Ebola virus causes Ebola virus disease (EVD; formerly known as Ebola haemorrhagic fever) in humans;
  • EVD outbreaks have a case fatality rate of up to 90%;
  • EVD outbreaks occur primarily in remote villages in Central and West Africa, near tropical rainforests;
  • The virus is transmitted to people from wild animals and spreads in the human population through human-to-human transmission;
  • Fruit bats of the Pteropodidae family are considered to be the natural host of the Ebola virus;
  • No specific treatment or vaccine is available for use in people or animals.

Acknowledgements:Data for this infographic was sourced from official reports from the World Health Organisation. I have also utilised resources from the CDC, CIDRAP, FluTrackers, H5N1 and Virology Down Under.

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