Outbreaks of cholera, measles and yellow fever can spread rapidly and be fatal. Malaria is endemic in more than 100 countries. Millions are living with HIV/AIDS and tuberculosis. Viral haemorrhagic diseases such as Ebola or Marburg are rarer, but are potentially fatal. The coronavirus COVID-19 pandemic has affected virtually every country on earth, infecting tens of millions of people and resulting in the death of over a million more.
The people at highest risk are mainly those living in poverty or in areas of great instability, such as in armed conflict or during mass displacement, where living conditions are precarious, access to healthcare is limited, and vaccination coverage is low.
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Featured
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In eastern Chad, cholera continues to spread
![MSF supported cholera treatment center in Al-Sadaqa hospital, Aden, Yemen MSF supported cholera treatment center in Al-Sadaqa hospital, Aden, Yemen](https://img.msf.org/AssetLink/jhswnu48i66wj33mbv810q2k7eew0o5f.jpg)
Cholera continues to spread
![Niger - Meningintis vaccination - April 2017 Niger - Meningintis vaccination - April 2017](https://img.msf.org/AssetLink/bxk73f5ixvn84q3e35i8v8qdeiem48a3.jpg)
MSF responds to declared outbreaks in Nigeria and Niger
![Niger - Meningintis vaccination - April 2017 Niger - Meningintis vaccination - April 2017](https://img.msf.org/AssetLink/48536k74o3cal7j4p7ss243xgknps8iw.jpg)
MSF teams support vaccination campaign against meningitis C outbreak
![](/themes/custom/msf_theme/src/kss/components/image/assets/placeholder.jpg)
Team dispatched following Ebola confirmation
![Yemeni chronicles Yemeni chronicles](https://img.msf.org/AssetLink/7465507r6olnn6vg62148n5k4ev44b3e.jpg)
MSF calls for increased response to cholera outbreak
![Diffa: Water and sanitation conditions Diffa: Water and sanitation conditions](https://img.msf.org/AssetLink/hfdy47x2t1ebua2bn4d3kp8yh388005r.jpg)
Hepatitis E outbreak linked to water shortages and poor sanitation
MSF publishes study on the accuracy of HIV rapid diagnostic tests
![](https://img.msf.org/AssetLink/23qd2y66031l1d5t13x7287k2340a5m5.jpg)
The Politics of Fear
Research & Analysis
MSF publishes study on the accuracy of HIV rapid diagnostic tests
Treating, Containing, Mobilizing: The Role of MSF in the West African Ebola Epidemic Response
![Ebola, Equateur province, DRC Ebola, Equateur province, DRC](https://img.msf.org/AssetLink/u16pej06p0elay840om2vu6aj612pe06.jpg)
MSF supported research on Ebola
![Kyrgyzstan - Decentralized care for TB patients Kyrgyzstan - Decentralized care for TB patients](https://img.msf.org/Docs/MSF/Media/CMS3/2/b/8/c/MSF149408.jpg)
New survey shows outdated policies and practices risk further spread of drug-resistant TB
![Meningitis Epidemic in Niger Meningitis Epidemic in Niger](https://img.msf.org/AssetLink/m3ll72b1v84414j21qdp73311m8uy5o1.jpg)
Epidemics: Neglected emergencies?
![Ebola in Paynesville, Liberia Ebola in Paynesville, Liberia](https://img.msf.org/Docs/MSF/Media/CMS3/9/8/a/4/MSB13568.jpg)
Ebola: Pushed to the limit and beyond
![MSF treats DR-TB cases MSF treats DR-TB cases](https://img.msf.org/AssetLink/5566774pfu3d53jvuq653348087bdtx6.jpg)