Cholera Outbreak in

International Medical Corps is responding to control the world’s largest cholera outbreak in Yemen. The outbreak simmered through the fall and winter months with an average of around 250 cases per week between October of 2016 when it was first detected before exploding in late April with as many as 5,000 suspected new cases per day.

By early November the World Health Organization had reported over 900,000 suspected cases extending over all but one of the country’s 23 governorates. In mid-summer it was described by the UN as the world’s largest cholera outbreak and has only expanded further since, although recent data indicate both the rate of new cases and the fatality rate are declining. Nearly 2,200 deaths have been associated with the epidemic. More than a third of those affected are children.

Largest Outbreak 

While cholera is endemic to Yemen, the current outbreak is the largest in recent memory

Civil War 

Yemen’s civil war complicates effort to control the outbreak and treat those affected


Half of Yemen’s population of 27 million lacks clean water, sanitation and hygiene services, a condition that increased the risk of infectious diseases

Frequently Asked Questions

  • What is Cholera?

    Cholera is transmitted by bacteria that live in contaminated food and water, causing severe watery diarrhea that can lead to intense dehydration and death with alarming speed if not treated.

  • Why is Yemen vulnerable to cholera and why is the outbreak so virulent there?

    Poor sanitation conditions have contributed to the current outbreak. Half of Yemen’s population of 27 million lacks clean water, sanitation and hygiene services. All of these condition increase the risk of infectious diseases. In addition, Yemen’s civil war has eroded further the already limited capacity of the country’s health care system to respond to a public health emergency.

  • Was Cholera brought into the country from outside or is it endemic to Yemen?

    Cholera is endemic to Yemen. About 7.6 million Yemenis—roughly a quarter of the country’s population—live in areas at high risk of cholera transmission.

  • Is it possible to vaccinate against cholera?

    Yes, oral vaccination against cholera is available and as recently as mid-June, the World Health Organization described plans to send 1 million doses of cholera vaccine to Yemen to help blunt the epidemic’s rapid spread. However, those plans were dropped after authorities assessed the practical realities on the ground in Yemen and concluded it was impractical to attempt such a vaccination campaign during a civil war in a country whose health system was on the verge of collapse.

  • How do you treat someone infected with the cholera bacteria and how can you slow the pace of the outbreak without vaccines?

    Treating cholera effectively requires two steps: stopping the diarrhea that can cause life-threatening dehydration if not brought under control quickly, and rehydrating patients. International Medical Corps operates both Diarrhea Treatment Units and Oral Rehydration Points in Yemen. Spreading knowledge about the importance of using clean water and practicing proper sanitation and hygiene techniques can have a significant impact in slowing the spread of an outbreak.

The Challenges

Limited Access

Civil war and the presence of well-armed militant groups such as Al-Qaeda make access to those in need of treatment both difficult in and dangerous

Ongoing Civil War

Now into its third year, the conflict has destroyed much of the country’s basic infrastructure which had been fragile before the war began

Water, Sanitation & Hygiene

Half of Yemen’s population lacks clean water, sanitation and hygiene services, increasing the risk of infectious diseases

Our Response

International Medical Corps moved quickly to implement measures to contain the outbreak as it gathered pace. We began work in four of the most severely hit governorates that included the capital, Sana’a, the southern port city of Aden, as well as Taizz and Ibb. We have established Diarrhea Treatment Units and Oral Rehydration Points, distributed hygiene kits, water purification tablets, and IV fluids and expanded our operations to include the additional governorates of Lahj and Al-Dahlee.

International Medical Corps currently operates 29 oral rehydration points and supports four diarrhea treatment units in an area that spans six of the 21 governorates in Yemen affected by the cholera outbreak. We are providing essential medications and IV fluids to established sites, enabling them to extend quality services to cholera patients. We also continue to conduct awareness sessions about the dangers of Cholera and how to prevent it.

International Medical Corps has already trained hundreds of Community Health Volunteers (CHVs) on cholera emergency response techniques and recently conducted refresher training for response, awareness and referral of suspected cases to Cholera Treatment Centers (CTCs) have been mobilized. In Aden, International Medical Corps has ongoing programs involving hygiene promotion and water, sanitation and hygiene activities. As part of the response, International Medical Corps plans to disinfect wells in locations not covered by potable water distribution.

In the Media

Help save lives in Yemen.