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15 charts, maps, and photos that explain the Ebola outbreak

1. Ebola was first discovered in 1976 in Zaire (now known as the Democratic Republic of Congo).

Ebola electron micrograph 1976

An electron micrograph containing the Ebola virus taken in 1976.

2. Between 1976 and 2013, 20 Ebola outbreaks killed a total of 1,548 people.

Previous Ebola outbreak

Previous Ebola Outbreaks by relative size. Joe Posner / Vox.

3. Four strains of Ebola can infect humans. The Zaire strain is the most deadly, and is the disease spreading in this outbreak.

Deadliness of Ebola Strains

The current outbreak is the Zaire ebolavirus. Joss Fong / Vox.

4. Ebola patients have to be kept in isolation wards. One problem is that West Africa lacks enough of them.

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Ibrahim Fambulle, barely able to stand, tries to walk to a different isolation room in an Ebola ward on August 15, 2014 in Monrovia, Liberia. Photo by John Moore/Getty Images.

5. This is the worst Ebola outbreak ever.

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Ebola deaths by outbreak. Joss Fong/Vox.

6. It's spread to seven countries and killed 3,091 people - nearly twice as many as all other outbreaks combined.

Ebola deaths, 2014 outbreak

7. Ebola has killed more than 200 health care workers in Africa.

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A Sierra Leonese burial team carries the coffin of Dr Modupeh Cole, Sierra Leone's second senior physician to die of Ebola. Carl De Souza/AFP/Getty Images.

8. Ebola is also spreading through unsafe burial practices in Africa.

The Tweh farm cemetery in Liberia, where burials have ben halted, September 30, 2014. Pascal Guyot / Getty Images.

9. The only way to catch Ebola is to have direct contact with the bodily fluids of someone who has Ebola and has begun showing symptoms.

Ebola flowchart

10. Modern public health systems can stop Ebola. West Africa's poverty and underfunded health care system allowed it to spread.

Health workforce

11. The CDC projects as many as 1.4 million people could be infected with Ebola by January if the outbreak isn't stopped.

CDC ebola projection

12. But Nigeria and Senegal stopped their Ebola outbreaks cold.

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Medics carry a Nigerian patient during his transfer to another hospital in Istanbul, Turkey on September 25, 2014. Metin Pala/Anadolu Agency/Getty Images.

13. A Texas hospital diagnosed the first-ever American case of Ebola on September 30.

ebola map

14. The United States has a robust health infrastructure that will near-certainly prevent the disease's spread.

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15. There is no cure, treatment or vaccine for Ebola.

Ebola vaccine testing

A possible Ebola vaccine called Chimp Adenovirus type 3 being tested in London. Steve Parsons-WPA Pool/Getty Images.

Calm down. You don't have Ebola.

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