Level 1 — Absolute Beginner

The Centers for Disease Control, called the CDC, works to stop diseases from spreading. On June 26, 2026, the CDC raised its response to the highest level. This was because of a very serious illness spreading in Africa.

The illness is called Ebola. It is spreading in a country called the Democratic Republic of Congo, or DRC. So far, more than one thousand one hundred people have gotten sick.

Doctors are working hard to help people who are ill. Scientists are also looking for ways to stop Ebola from spreading to more countries.

disease

a sickness that can spread from one person to another

outbreak

when many people in one place get sick at the same time

virus

a very tiny thing that can make people very sick

doctor

a person trained to help sick people get better

spread

to move from one place or person to another

response

an action taken to deal with a problem

scientist

a person who studies nature and does experiments

confirm

to show that something is definitely true

Level 2 — Elementary

The United States Centers for Disease Control and Prevention activated its highest emergency response level on June 26, 2026. This Level One activation was a reaction to a serious Ebola outbreak in the Democratic Republic of Congo, also called the DRC.

The outbreak has affected mainly the Ituri province of the DRC, but cases have also appeared in North Kivu and South Kivu, as well as in neighbouring Uganda. By June 29, health officials had confirmed one thousand one hundred fifty-five cases and three hundred four deaths.

This outbreak is caused by the Bundibugyo type of the Ebola virus. There is no approved vaccine for this type. Scientists are using an experimental treatment called MBP134 to try to save lives. France confirmed the first Ebola case in the European Union on June 24.

activation

the process of starting or putting something into action

province

a large area within a country, similar to a state or region

confirmed

officially checked and shown to be true

vaccine

a substance given to people to protect them from getting a disease

experimental

not yet fully tested or approved; still being studied

neighbouring

located next to or very close to another place

treatment

medical care given to a patient to fight a disease

fatality rate

the percentage of sick people who die from a disease

Level 3 — Intermediate

The United States Centers for Disease Control and Prevention escalated its response to the Ebola crisis to a Level One Emergency Operations activation on June 26, 2026, its highest possible readiness tier. The declaration reflects the severity of an outbreak centred in the Ituri province of the Democratic Republic of Congo, which had recorded one thousand and fifty-four cases across twenty-two health zones by late June, with spillover into North Kivu, South Kivu, and neighbouring Uganda.

By June 29, the outbreak had produced one thousand one hundred fifty-five confirmed cases and three hundred four deaths, a case fatality rate of approximately twenty-five percent. The pathogen is the Bundibugyo ebolavirus, first identified during a 2007 outbreak in Uganda. Unlike the more familiar Zaire strain, no licensed vaccine exists for Bundibugyo. The United States Biomedical Advanced Research and Development Authority deployed an experimental antibody cocktail designated MBP134 under compassionate use protocols.

The scale of the outbreak drew comparisons to the 2018 to 2020 Kivu Ebola crisis, when sustained armed conflict in eastern DRC severely hampered response operations. The World Health Organization had already declared a Public Health Emergency of International Concern on May 17, 2026. The outbreak spread further when France reported the first confirmed Ebola case within the European Union on June 24, linked to recent travel from the DRC, and a separate US citizen was medically evacuated to Germany for treatment.

escalated

increased to a more serious or intensive level

readiness tier

a classification level indicating how prepared an organisation is to respond

spillover

the spread of a disease beyond its initial geographic boundaries

case fatality rate

the proportion of confirmed patients who die from a disease

pathogen

a microorganism that causes disease in its host

compassionate use

a regulatory pathway allowing experimental treatments for seriously ill patients

hampered

made more difficult; obstructed or hindered

PHEIC

Public Health Emergency of International Concern, the WHO's highest level of alert

Level 4 — Advanced

The United States Centers for Disease Control and Prevention invoked a Level One Emergency Operations Center activation on June 26, 2026, its highest organisational readiness classification, in response to a rapidly expanding outbreak of Bundibugyo ebolavirus in the Democratic Republic of Congo. As of late June, the outbreak had generated one thousand and fifty-four laboratory-confirmed cases distributed across twenty-two health zones in Ituri province, the epicentre, with secondary chains of transmission documented in North Kivu, South Kivu, and across the border in Uganda.

The aggregate confirmed case count reached one thousand one hundred fifty-five by June 29, with three hundred four associated deaths, producing a case fatality ratio of approximately twenty-six percent, markedly higher than the eighteen to twenty-five percent range observed in the 2007 Bundibugyo, Uganda, index outbreak in which the strain was first characterised. No WHO-prequalified vaccine exists for the Bundibugyo species, in contrast to the Zaire strain addressed by the rVSV-ZEBOV (Ervebo) vaccine. In the absence of licensed biologics, the United States Biomedical Advanced Research and Development Authority coordinated compassionate-use deployment of MBP134, a bispecific monoclonal antibody cocktail targeting multiple glycoprotein epitopes.

The epidemiological and operational parallels to the 2018-2020 Kivu Ebola crisis are striking: both outbreaks are centred in conflict-affected eastern DRC, where active armed group activity has restricted humanitarian access and disrupted contact tracing infrastructure. The World Health Organization convened an Emergency Committee under the International Health Regulations and declared a Public Health Emergency of International Concern on May 17, 2026, the same designation applied during the 2014 to 2016 West Africa epidemic, to date the largest Ebola outbreak on record with more than twenty-eight thousand cases. The current outbreak, if not contained, risks approaching record territory. International concern intensified when France notified WHO of the European Union's first confirmed imported case on June 24, linked to a traveller returning from Ituri, and a second imported case required medical evacuation from the United States to a specialist biocontainment unit in Germany.

invoked

formally triggered or put into effect an official procedure

epicentre

the point of origin or greatest intensity of an event

case fatality ratio

the proportion of confirmed cases resulting in death, expressed as a percentage

bispecific monoclonal antibody

an engineered protein that simultaneously binds two different molecular targets to block a pathogen

glycoprotein epitope

a specific molecular site on a virus surface protein where an antibody attaches to neutralise it

prequalified

formally assessed and approved by the WHO for quality, safety, and efficacy